21918240

素因数分解:

$2^5\times 3^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{491}}^1$

素因数の和:543

約数の個数: 144

約数和(自身を含む): 77366016

約数和(自身を除く): 55447776

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 31, 32, 36, 40, 45, 48, 60, 62, 72, 80, 90, 93, 96, 120, 124, 144, 155, 160, 180, 186, 240, 248, 279, 288, 310, 360, 372, 465, 480, 491, 496, 558, 620, 720, 744, 930, 982, 992, 1116, 1240, 1395, 1440, 1473, 1488, 1860, 1964, 2232, 2455, 2480, 2790, 2946, 2976, 3720, 3928, 4419, 4464, 4910, 4960, 5580, 5892, 7365, 7440, 7856, 8838, 8928, 9820, 11160, 11784, 14730, 14880, 15221, 15712, 17676, 19640, 22095, 22320, 23568, 29460, 30442, 35352, 39280, 44190, 44640, 45663, 47136, 58920, 60884, 70704, 76105, 78560, 88380, 91326, 117840, 121768, 136989, 141408, 152210, 176760, 182652, 228315, 235680, 243536, 273978, 304420, 353520, 365304, 456630, 487072, 547956, 608840, 684945, 707040, 730608, 913260, 1095912, 1217680, 1369890, 1461216, 1826520, 2191824, 2435360, 2739780, 3653040, 4383648, 5479560, 7306080, 10959120, 21918240]

約数ペア:

[(1, 21918240), (2, 10959120), (3, 7306080), (4, 5479560), (5, 4383648), (6, 3653040), (8, 2739780), (9, 2435360), (10, 2191824), (12, 1826520), (15, 1461216), (16, 1369890), (18, 1217680), (20, 1095912), (24, 913260), (30, 730608), (31, 707040), (32, 684945), (36, 608840), (40, 547956), (45, 487072), (48, 456630), (60, 365304), (62, 353520), (72, 304420), (80, 273978), (90, 243536), (93, 235680), (96, 228315), (120, 182652), (124, 176760), (144, 152210), (155, 141408), (160, 136989), (180, 121768), (186, 117840), (240, 91326), (248, 88380), (279, 78560), (288, 76105), (310, 70704), (360, 60884), (372, 58920), (465, 47136), (480, 45663), (491, 44640), (496, 44190), (558, 39280), (620, 35352), (720, 30442), (744, 29460), (930, 23568), (982, 22320), (992, 22095), (1116, 19640), (1240, 17676), (1395, 15712), (1440, 15221), (1473, 14880), (1488, 14730), (1860, 11784), (1964, 11160), (2232, 9820), (2455, 8928), (2480, 8838), (2790, 7856), (2946, 7440), (2976, 7365), (3720, 5892), (3928, 5580), (4419, 4960), (4464, 4910)]