21665658520

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{693523}}^1$

素因数の和:693616

約数の個数: 64

約数和(自身を含む): 53928426240

約数和(自身を除く): 32262767720

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 71, 88, 110, 142, 220, 284, 355, 440, 568, 710, 781, 1420, 1562, 2840, 3124, 3905, 6248, 7810, 15620, 31240, 693523, 1387046, 2774092, 3467615, 5548184, 6935230, 7628753, 13870460, 15257506, 27740920, 30515012, 38143765, 49240133, 61030024, 76287530, 98480266, 152575060, 196960532, 246200665, 305150120, 393921064, 492401330, 541641463, 984802660, 1083282926, 1969605320, 2166565852, 2708207315, 4333131704, 5416414630, 10832829260, 21665658520]

約数ペア:

[(1, 21665658520), (2, 10832829260), (4, 5416414630), (5, 4333131704), (8, 2708207315), (10, 2166565852), (11, 1969605320), (20, 1083282926), (22, 984802660), (40, 541641463), (44, 492401330), (55, 393921064), (71, 305150120), (88, 246200665), (110, 196960532), (142, 152575060), (220, 98480266), (284, 76287530), (355, 61030024), (440, 49240133), (568, 38143765), (710, 30515012), (781, 27740920), (1420, 15257506), (1562, 13870460), (2840, 7628753), (3124, 6935230), (3905, 5548184), (6248, 3467615), (7810, 2774092), (15620, 1387046), (31240, 693523)]