161557780

素因数分解:

$2^2\times 5^1\times {\mathrm{53}}^1\times {\mathrm{173}}^1\times {\mathrm{881}}^1$

素因数の和:1116

約数の個数: 48

約数和(自身を含む): 348065424

約数和(自身を除く): 186507644

約数列:

[1, 2, 4, 5, 10, 20, 53, 106, 173, 212, 265, 346, 530, 692, 865, 881, 1060, 1730, 1762, 3460, 3524, 4405, 8810, 9169, 17620, 18338, 36676, 45845, 46693, 91690, 93386, 152413, 183380, 186772, 233465, 304826, 466930, 609652, 762065, 933860, 1524130, 3048260, 8077889, 16155778, 32311556, 40389445, 80778890, 161557780]

約数ペア:

[(1, 161557780), (2, 80778890), (4, 40389445), (5, 32311556), (10, 16155778), (20, 8077889), (53, 3048260), (106, 1524130), (173, 933860), (212, 762065), (265, 609652), (346, 466930), (530, 304826), (692, 233465), (865, 186772), (881, 183380), (1060, 152413), (1730, 93386), (1762, 91690), (3460, 46693), (3524, 45845), (4405, 36676), (8810, 18338), (9169, 17620)]