About the Number

280402020

280402019 ← → 280402021

2進数表記:10000101101101001100001100100

漢数字表記:二億八千四十万二千二十

素因数分解:

2 2 × 3 3 × 5 1 × 353 1 × 1471 1

素因数の和:1842
約数の個数: 96
約数和(自身を含む): 875427840
約数和(自身を除く): 595025820

約数列:
[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 27, 30, 36, 45, 54, 60, 90, 108, 135, 180, 270, 353, 540, 706, 1059, 1412, 1471, 1765, 2118, 2942, 3177, 3530, 4236, 4413, 5295, 5884, 6354, 7060, 7355, 8826, 9531, 10590, 12708, 13239, 14710, 15885, 17652, 19062, 21180, 22065, 26478, 29420, 31770, 38124, 39717, 44130, 47655, 52956, 63540, 66195, 79434, 88260, 95310, 132390, 158868, 190620, 198585, 264780, 397170, 519263, 794340, 1038526, 1557789, 2077052, 2596315, 3115578, 4673367, 5192630, 6231156, 7788945, 9346734, 10385260, 14020101, 15577890, 18693468, 23366835, 28040202, 31155780, 46733670, 56080404, 70100505, 93467340, 140201010, 280402020]

約数ペア:
[(1, 280402020), (2, 140201010), (3, 93467340), (4, 70100505), (5, 56080404), (6, 46733670), (9, 31155780), (10, 28040202), (12, 23366835), (15, 18693468), (18, 15577890), (20, 14020101), (27, 10385260), (30, 9346734), (36, 7788945), (45, 6231156), (54, 5192630), (60, 4673367), (90, 3115578), (108, 2596315), (135, 2077052), (180, 1557789), (270, 1038526), (353, 794340), (540, 519263), (706, 397170), (1059, 264780), (1412, 198585), (1471, 190620), (1765, 158868), (2118, 132390), (2942, 95310), (3177, 88260), (3530, 79434), (4236, 66195), (4413, 63540), (5295, 52956), (5884, 47655), (6354, 44130), (7060, 39717), (7355, 38124), (8826, 31770), (9531, 29420), (10590, 26478), (12708, 22065), (13239, 21180), (14710, 19062), (15885, 17652)]

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