21223940

素因数分解:

$2^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{29}}^1\times {\mathrm{37}}^1\times {\mathrm{43}}^1$

素因数の和:141

約数の個数: 96

約数和(自身を含む): 50561280

約数和(自身を除く): 29337340

約数列:

[1, 2, 4, 5, 10, 20, 23, 29, 37, 43, 46, 58, 74, 86, 92, 115, 116, 145, 148, 172, 185, 215, 230, 290, 370, 430, 460, 580, 667, 740, 851, 860, 989, 1073, 1247, 1334, 1591, 1702, 1978, 2146, 2494, 2668, 3182, 3335, 3404, 3956, 4255, 4292, 4945, 4988, 5365, 6235, 6364, 6670, 7955, 8510, 9890, 10730, 12470, 13340, 15910, 17020, 19780, 21460, 24679, 24940, 28681, 31820, 36593, 46139, 49358, 57362, 73186, 92278, 98716, 114724, 123395, 143405, 146372, 182965, 184556, 230695, 246790, 286810, 365930, 461390, 493580, 573620, 731860, 922780, 1061197, 2122394, 4244788, 5305985, 10611970, 21223940]

約数ペア:

[(1, 21223940), (2, 10611970), (4, 5305985), (5, 4244788), (10, 2122394), (20, 1061197), (23, 922780), (29, 731860), (37, 573620), (43, 493580), (46, 461390), (58, 365930), (74, 286810), (86, 246790), (92, 230695), (115, 184556), (116, 182965), (145, 146372), (148, 143405), (172, 123395), (185, 114724), (215, 98716), (230, 92278), (290, 73186), (370, 57362), (430, 49358), (460, 46139), (580, 36593), (667, 31820), (740, 28681), (851, 24940), (860, 24679), (989, 21460), (1073, 19780), (1247, 17020), (1334, 15910), (1591, 13340), (1702, 12470), (1978, 10730), (2146, 9890), (2494, 8510), (2668, 7955), (3182, 6670), (3335, 6364), (3404, 6235), (3956, 5365), (4255, 4988), (4292, 4945)]