About the Number

681561972

681561971 ← → 681561973

2進数表記:101000100111111100111101110100

漢数字表記:六億八千百五十六万千九百七十二

素因数分解:

2 2 × 3 3 × 7 2 × 13 1 × 9907 1

素因数の和:9947
約数の個数: 144
約数和(自身を含む): 2213843520
約数和(自身を除く): 1532281548

約数列:
[1, 2, 3, 4, 6, 7, 9, 12, 13, 14, 18, 21, 26, 27, 28, 36, 39, 42, 49, 52, 54, 63, 78, 84, 91, 98, 108, 117, 126, 147, 156, 182, 189, 196, 234, 252, 273, 294, 351, 364, 378, 441, 468, 546, 588, 637, 702, 756, 819, 882, 1092, 1274, 1323, 1404, 1638, 1764, 1911, 2457, 2548, 2646, 3276, 3822, 4914, 5292, 5733, 7644, 9828, 9907, 11466, 17199, 19814, 22932, 29721, 34398, 39628, 59442, 68796, 69349, 89163, 118884, 128791, 138698, 178326, 208047, 257582, 267489, 277396, 356652, 386373, 416094, 485443, 515164, 534978, 624141, 772746, 832188, 901537, 970886, 1069956, 1159119, 1248282, 1456329, 1545492, 1803074, 1872423, 1941772, 2318238, 2496564, 2704611, 2912658, 3477357, 3606148, 3744846, 4368987, 4636476, 5409222, 5825316, 6310759, 6954714, 7489692, 8113833, 8737974, 10818444, 12621518, 13106961, 13909428, 16227666, 17475948, 18932277, 24341499, 25243036, 26213922, 32455332, 37864554, 48682998, 52427844, 56796831, 75729108, 97365996, 113593662, 170390493, 227187324, 340780986, 681561972]

約数ペア:
[(1, 681561972), (2, 340780986), (3, 227187324), (4, 170390493), (6, 113593662), (7, 97365996), (9, 75729108), (12, 56796831), (13, 52427844), (14, 48682998), (18, 37864554), (21, 32455332), (26, 26213922), (27, 25243036), (28, 24341499), (36, 18932277), (39, 17475948), (42, 16227666), (49, 13909428), (52, 13106961), (54, 12621518), (63, 10818444), (78, 8737974), (84, 8113833), (91, 7489692), (98, 6954714), (108, 6310759), (117, 5825316), (126, 5409222), (147, 4636476), (156, 4368987), (182, 3744846), (189, 3606148), (196, 3477357), (234, 2912658), (252, 2704611), (273, 2496564), (294, 2318238), (351, 1941772), (364, 1872423), (378, 1803074), (441, 1545492), (468, 1456329), (546, 1248282), (588, 1159119), (637, 1069956), (702, 970886), (756, 901537), (819, 832188), (882, 772746), (1092, 624141), (1274, 534978), (1323, 515164), (1404, 485443), (1638, 416094), (1764, 386373), (1911, 356652), (2457, 277396), (2548, 267489), (2646, 257582), (3276, 208047), (3822, 178326), (4914, 138698), (5292, 128791), (5733, 118884), (7644, 89163), (9828, 69349), (9907, 68796), (11466, 59442), (17199, 39628), (19814, 34398), (22932, 29721)]

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