64400800

素因数分解:

$2^5\times 5^2\times {\mathrm{79}}^1\times {\mathrm{1019}}^1$

素因数の和:1118

約数の個数: 72

約数和(自身を含む): 159364800

約数和(自身を除く): 94964000

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 79, 80, 100, 158, 160, 200, 316, 395, 400, 632, 790, 800, 1019, 1264, 1580, 1975, 2038, 2528, 3160, 3950, 4076, 5095, 6320, 7900, 8152, 10190, 12640, 15800, 16304, 20380, 25475, 31600, 32608, 40760, 50950, 63200, 80501, 81520, 101900, 161002, 163040, 203800, 322004, 402505, 407600, 644008, 805010, 815200, 1288016, 1610020, 2012525, 2576032, 3220040, 4025050, 6440080, 8050100, 12880160, 16100200, 32200400, 64400800]

約数ペア:

[(1, 64400800), (2, 32200400), (4, 16100200), (5, 12880160), (8, 8050100), (10, 6440080), (16, 4025050), (20, 3220040), (25, 2576032), (32, 2012525), (40, 1610020), (50, 1288016), (79, 815200), (80, 805010), (100, 644008), (158, 407600), (160, 402505), (200, 322004), (316, 203800), (395, 163040), (400, 161002), (632, 101900), (790, 81520), (800, 80501), (1019, 63200), (1264, 50950), (1580, 40760), (1975, 32608), (2038, 31600), (2528, 25475), (3160, 20380), (3950, 16304), (4076, 15800), (5095, 12640), (6320, 10190), (7900, 8152)]