31678660

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{37}}^2\times {\mathrm{89}}^1$

素因数の和:185

約数の個数: 72

約数和(自身を含む): 74458440

約数和(自身を除く): 42779780

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 37, 52, 65, 74, 89, 130, 148, 178, 185, 260, 356, 370, 445, 481, 740, 890, 962, 1157, 1369, 1780, 1924, 2314, 2405, 2738, 3293, 4628, 4810, 5476, 5785, 6586, 6845, 9620, 11570, 13172, 13690, 16465, 17797, 23140, 27380, 32930, 35594, 42809, 65860, 71188, 85618, 88985, 121841, 171236, 177970, 214045, 243682, 355940, 428090, 487364, 609205, 856180, 1218410, 1583933, 2436820, 3167866, 6335732, 7919665, 15839330, 31678660]

約数ペア:

[(1, 31678660), (2, 15839330), (4, 7919665), (5, 6335732), (10, 3167866), (13, 2436820), (20, 1583933), (26, 1218410), (37, 856180), (52, 609205), (65, 487364), (74, 428090), (89, 355940), (130, 243682), (148, 214045), (178, 177970), (185, 171236), (260, 121841), (356, 88985), (370, 85618), (445, 71188), (481, 65860), (740, 42809), (890, 35594), (962, 32930), (1157, 27380), (1369, 23140), (1780, 17797), (1924, 16465), (2314, 13690), (2405, 13172), (2738, 11570), (3293, 9620), (4628, 6845), (4810, 6586), (5476, 5785)]