161826920

素因数分解:

$2^3\times 5^1\times {\mathrm{89}}^1\times {\mathrm{131}}^1\times {\mathrm{347}}^1$

素因数の和:578

約数の個数: 64

約数和(自身を含む): 372081600

約数和(自身を除く): 210254680

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 89, 131, 178, 262, 347, 356, 445, 524, 655, 694, 712, 890, 1048, 1310, 1388, 1735, 1780, 2620, 2776, 3470, 3560, 5240, 6940, 11659, 13880, 23318, 30883, 45457, 46636, 58295, 61766, 90914, 93272, 116590, 123532, 154415, 181828, 227285, 233180, 247064, 308830, 363656, 454570, 466360, 617660, 909140, 1235320, 1818280, 4045673, 8091346, 16182692, 20228365, 32365384, 40456730, 80913460, 161826920]

約数ペア:

[(1, 161826920), (2, 80913460), (4, 40456730), (5, 32365384), (8, 20228365), (10, 16182692), (20, 8091346), (40, 4045673), (89, 1818280), (131, 1235320), (178, 909140), (262, 617660), (347, 466360), (356, 454570), (445, 363656), (524, 308830), (655, 247064), (694, 233180), (712, 227285), (890, 181828), (1048, 154415), (1310, 123532), (1388, 116590), (1735, 93272), (1780, 90914), (2620, 61766), (2776, 58295), (3470, 46636), (3560, 45457), (5240, 30883), (6940, 23318), (11659, 13880)]