18748280

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{79}}^1\times {\mathrm{349}}^1$

素因数の和:456

約数の個数: 64

約数和(自身を含む): 45360000

約数和(自身を除く): 26611720

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 79, 85, 136, 158, 170, 316, 340, 349, 395, 632, 680, 698, 790, 1343, 1396, 1580, 1745, 2686, 2792, 3160, 3490, 5372, 5933, 6715, 6980, 10744, 11866, 13430, 13960, 23732, 26860, 27571, 29665, 47464, 53720, 55142, 59330, 110284, 118660, 137855, 220568, 237320, 275710, 468707, 551420, 937414, 1102840, 1874828, 2343535, 3749656, 4687070, 9374140, 18748280]

約数ペア:

[(1, 18748280), (2, 9374140), (4, 4687070), (5, 3749656), (8, 2343535), (10, 1874828), (17, 1102840), (20, 937414), (34, 551420), (40, 468707), (68, 275710), (79, 237320), (85, 220568), (136, 137855), (158, 118660), (170, 110284), (316, 59330), (340, 55142), (349, 53720), (395, 47464), (632, 29665), (680, 27571), (698, 26860), (790, 23732), (1343, 13960), (1396, 13430), (1580, 11866), (1745, 10744), (2686, 6980), (2792, 6715), (3160, 5933), (3490, 5372)]