21187140

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{1181}}^1$

素因数の和:1229

約数の個数: 96

約数和(自身を含む): 66721536

約数和(自身を除く): 45534396

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 23, 26, 30, 39, 46, 52, 60, 65, 69, 78, 92, 115, 130, 138, 156, 195, 230, 260, 276, 299, 345, 390, 460, 598, 690, 780, 897, 1181, 1196, 1380, 1495, 1794, 2362, 2990, 3543, 3588, 4485, 4724, 5905, 5980, 7086, 8970, 11810, 14172, 15353, 17715, 17940, 23620, 27163, 30706, 35430, 46059, 54326, 61412, 70860, 76765, 81489, 92118, 108652, 135815, 153530, 162978, 184236, 230295, 271630, 307060, 325956, 353119, 407445, 460590, 543260, 706238, 814890, 921180, 1059357, 1412476, 1629780, 1765595, 2118714, 3531190, 4237428, 5296785, 7062380, 10593570, 21187140]

約数ペア:

[(1, 21187140), (2, 10593570), (3, 7062380), (4, 5296785), (5, 4237428), (6, 3531190), (10, 2118714), (12, 1765595), (13, 1629780), (15, 1412476), (20, 1059357), (23, 921180), (26, 814890), (30, 706238), (39, 543260), (46, 460590), (52, 407445), (60, 353119), (65, 325956), (69, 307060), (78, 271630), (92, 230295), (115, 184236), (130, 162978), (138, 153530), (156, 135815), (195, 108652), (230, 92118), (260, 81489), (276, 76765), (299, 70860), (345, 61412), (390, 54326), (460, 46059), (598, 35430), (690, 30706), (780, 27163), (897, 23620), (1181, 17940), (1196, 17715), (1380, 15353), (1495, 14172), (1794, 11810), (2362, 8970), (2990, 7086), (3543, 5980), (3588, 5905), (4485, 4724)]