28415920

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{89}}^1\times {\mathrm{307}}^1$

素因数の和:422

約数の個数: 80

約数和(自身を含む): 72182880

約数和(自身を除く): 43766960

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 89, 104, 130, 178, 208, 260, 307, 356, 445, 520, 614, 712, 890, 1040, 1157, 1228, 1424, 1535, 1780, 2314, 2456, 3070, 3560, 3991, 4628, 4912, 5785, 6140, 7120, 7982, 9256, 11570, 12280, 15964, 18512, 19955, 23140, 24560, 27323, 31928, 39910, 46280, 54646, 63856, 79820, 92560, 109292, 136615, 159640, 218584, 273230, 319280, 355199, 437168, 546460, 710398, 1092920, 1420796, 1775995, 2185840, 2841592, 3551990, 5683184, 7103980, 14207960, 28415920]

約数ペア:

[(1, 28415920), (2, 14207960), (4, 7103980), (5, 5683184), (8, 3551990), (10, 2841592), (13, 2185840), (16, 1775995), (20, 1420796), (26, 1092920), (40, 710398), (52, 546460), (65, 437168), (80, 355199), (89, 319280), (104, 273230), (130, 218584), (178, 159640), (208, 136615), (260, 109292), (307, 92560), (356, 79820), (445, 63856), (520, 54646), (614, 46280), (712, 39910), (890, 31928), (1040, 27323), (1157, 24560), (1228, 23140), (1424, 19955), (1535, 18512), (1780, 15964), (2314, 12280), (2456, 11570), (3070, 9256), (3560, 7982), (3991, 7120), (4628, 6140), (4912, 5785)]