78399920

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^2\times {\mathrm{3391}}^1$

素因数の和:3438

約数の個数: 60

約数和(自身を含む): 193689984

約数和(自身を除く): 115290064

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 40, 68, 80, 85, 136, 170, 272, 289, 340, 578, 680, 1156, 1360, 1445, 2312, 2890, 3391, 4624, 5780, 6782, 11560, 13564, 16955, 23120, 27128, 33910, 54256, 57647, 67820, 115294, 135640, 230588, 271280, 288235, 461176, 576470, 922352, 979999, 1152940, 1959998, 2305880, 3919996, 4611760, 4899995, 7839992, 9799990, 15679984, 19599980, 39199960, 78399920]

約数ペア:

[(1, 78399920), (2, 39199960), (4, 19599980), (5, 15679984), (8, 9799990), (10, 7839992), (16, 4899995), (17, 4611760), (20, 3919996), (34, 2305880), (40, 1959998), (68, 1152940), (80, 979999), (85, 922352), (136, 576470), (170, 461176), (272, 288235), (289, 271280), (340, 230588), (578, 135640), (680, 115294), (1156, 67820), (1360, 57647), (1445, 54256), (2312, 33910), (2890, 27128), (3391, 23120), (4624, 16955), (5780, 13564), (6782, 11560)]