81249880

素因数分解:

$2^3\times 5^1\times {\mathrm{29}}^1\times {\mathrm{89}}^1\times {\mathrm{787}}^1$

素因数の和:916

約数の個数: 64

約数和(自身を含む): 191484000

約数和(自身を除く): 110234120

約数列:

[1, 2, 4, 5, 8, 10, 20, 29, 40, 58, 89, 116, 145, 178, 232, 290, 356, 445, 580, 712, 787, 890, 1160, 1574, 1780, 2581, 3148, 3560, 3935, 5162, 6296, 7870, 10324, 12905, 15740, 20648, 22823, 25810, 31480, 45646, 51620, 70043, 91292, 103240, 114115, 140086, 182584, 228230, 280172, 350215, 456460, 560344, 700430, 912920, 1400860, 2031247, 2801720, 4062494, 8124988, 10156235, 16249976, 20312470, 40624940, 81249880]

約数ペア:

[(1, 81249880), (2, 40624940), (4, 20312470), (5, 16249976), (8, 10156235), (10, 8124988), (20, 4062494), (29, 2801720), (40, 2031247), (58, 1400860), (89, 912920), (116, 700430), (145, 560344), (178, 456460), (232, 350215), (290, 280172), (356, 228230), (445, 182584), (580, 140086), (712, 114115), (787, 103240), (890, 91292), (1160, 70043), (1574, 51620), (1780, 45646), (2581, 31480), (3148, 25810), (3560, 22823), (3935, 20648), (5162, 15740), (6296, 12905), (7870, 10324)]