21681990

素因数分解:

$2^1\times 3^2\times 5^1\times {\mathrm{11}}^3\times {\mathrm{181}}^1$

素因数の和:227

約数の個数: 96

約数和(自身を含む): 62348832

約数和(自身を除く): 40666842

約数列:

[1, 2, 3, 5, 6, 9, 10, 11, 15, 18, 22, 30, 33, 45, 55, 66, 90, 99, 110, 121, 165, 181, 198, 242, 330, 362, 363, 495, 543, 605, 726, 905, 990, 1086, 1089, 1210, 1331, 1629, 1810, 1815, 1991, 2178, 2662, 2715, 3258, 3630, 3982, 3993, 5430, 5445, 5973, 6655, 7986, 8145, 9955, 10890, 11946, 11979, 13310, 16290, 17919, 19910, 19965, 21901, 23958, 29865, 35838, 39930, 43802, 59730, 59895, 65703, 89595, 109505, 119790, 131406, 179190, 197109, 219010, 240911, 328515, 394218, 481822, 657030, 722733, 985545, 1204555, 1445466, 1971090, 2168199, 2409110, 3613665, 4336398, 7227330, 10840995, 21681990]

約数ペア:

[(1, 21681990), (2, 10840995), (3, 7227330), (5, 4336398), (6, 3613665), (9, 2409110), (10, 2168199), (11, 1971090), (15, 1445466), (18, 1204555), (22, 985545), (30, 722733), (33, 657030), (45, 481822), (55, 394218), (66, 328515), (90, 240911), (99, 219010), (110, 197109), (121, 179190), (165, 131406), (181, 119790), (198, 109505), (242, 89595), (330, 65703), (362, 59895), (363, 59730), (495, 43802), (543, 39930), (605, 35838), (726, 29865), (905, 23958), (990, 21901), (1086, 19965), (1089, 19910), (1210, 17919), (1331, 16290), (1629, 13310), (1810, 11979), (1815, 11946), (1991, 10890), (2178, 9955), (2662, 8145), (2715, 7986), (3258, 6655), (3630, 5973), (3982, 5445), (3993, 5430)]