12720760

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{1439}}^1$

素因数の和:1480

約数の個数: 64

約数和(自身を含む): 32659200

約数和(自身を除く): 19938440

約数列:

[1, 2, 4, 5, 8, 10, 13, 17, 20, 26, 34, 40, 52, 65, 68, 85, 104, 130, 136, 170, 221, 260, 340, 442, 520, 680, 884, 1105, 1439, 1768, 2210, 2878, 4420, 5756, 7195, 8840, 11512, 14390, 18707, 24463, 28780, 37414, 48926, 57560, 74828, 93535, 97852, 122315, 149656, 187070, 195704, 244630, 318019, 374140, 489260, 636038, 748280, 978520, 1272076, 1590095, 2544152, 3180190, 6360380, 12720760]

約数ペア:

[(1, 12720760), (2, 6360380), (4, 3180190), (5, 2544152), (8, 1590095), (10, 1272076), (13, 978520), (17, 748280), (20, 636038), (26, 489260), (34, 374140), (40, 318019), (52, 244630), (65, 195704), (68, 187070), (85, 149656), (104, 122315), (130, 97852), (136, 93535), (170, 74828), (221, 57560), (260, 48926), (340, 37414), (442, 28780), (520, 24463), (680, 18707), (884, 14390), (1105, 11512), (1439, 8840), (1768, 7195), (2210, 5756), (2878, 4420)]