221335880

素因数分解:

$2^3\times 5^1\times {\mathrm{79}}^1\times {\mathrm{89}}^1\times {\mathrm{787}}^1$

素因数の和:966

約数の個数: 64

約数和(自身を含む): 510624000

約数和(自身を除く): 289288120

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 79, 89, 158, 178, 316, 356, 395, 445, 632, 712, 787, 790, 890, 1574, 1580, 1780, 3148, 3160, 3560, 3935, 6296, 7031, 7870, 14062, 15740, 28124, 31480, 35155, 56248, 62173, 70043, 70310, 124346, 140086, 140620, 248692, 280172, 281240, 310865, 350215, 497384, 560344, 621730, 700430, 1243460, 1400860, 2486920, 2801720, 5533397, 11066794, 22133588, 27666985, 44267176, 55333970, 110667940, 221335880]

約数ペア:

[(1, 221335880), (2, 110667940), (4, 55333970), (5, 44267176), (8, 27666985), (10, 22133588), (20, 11066794), (40, 5533397), (79, 2801720), (89, 2486920), (158, 1400860), (178, 1243460), (316, 700430), (356, 621730), (395, 560344), (445, 497384), (632, 350215), (712, 310865), (787, 281240), (790, 280172), (890, 248692), (1574, 140620), (1580, 140086), (1780, 124346), (3148, 70310), (3160, 70043), (3560, 62173), (3935, 56248), (6296, 35155), (7031, 31480), (7870, 28124), (14062, 15740)]