21210120

素因数分解:

$2^3\times 3^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{479}}^1$

素因数の和:540

約数の個数: 128

約数和(自身を含む): 72576000

約数和(自身を除く): 51365880

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 18, 20, 24, 27, 30, 36, 40, 41, 45, 54, 60, 72, 82, 90, 108, 120, 123, 135, 164, 180, 205, 216, 246, 270, 328, 360, 369, 410, 479, 492, 540, 615, 738, 820, 958, 984, 1080, 1107, 1230, 1437, 1476, 1640, 1845, 1916, 2214, 2395, 2460, 2874, 2952, 3690, 3832, 4311, 4428, 4790, 4920, 5535, 5748, 7185, 7380, 8622, 8856, 9580, 11070, 11496, 12933, 14370, 14760, 17244, 19160, 19639, 21555, 22140, 25866, 28740, 34488, 39278, 43110, 44280, 51732, 57480, 58917, 64665, 78556, 86220, 98195, 103464, 117834, 129330, 157112, 172440, 176751, 196390, 235668, 258660, 294585, 353502, 392780, 471336, 517320, 530253, 589170, 707004, 785560, 883755, 1060506, 1178340, 1414008, 1767510, 2121012, 2356680, 2651265, 3535020, 4242024, 5302530, 7070040, 10605060, 21210120]

約数ペア:

[(1, 21210120), (2, 10605060), (3, 7070040), (4, 5302530), (5, 4242024), (6, 3535020), (8, 2651265), (9, 2356680), (10, 2121012), (12, 1767510), (15, 1414008), (18, 1178340), (20, 1060506), (24, 883755), (27, 785560), (30, 707004), (36, 589170), (40, 530253), (41, 517320), (45, 471336), (54, 392780), (60, 353502), (72, 294585), (82, 258660), (90, 235668), (108, 196390), (120, 176751), (123, 172440), (135, 157112), (164, 129330), (180, 117834), (205, 103464), (216, 98195), (246, 86220), (270, 78556), (328, 64665), (360, 58917), (369, 57480), (410, 51732), (479, 44280), (492, 43110), (540, 39278), (615, 34488), (738, 28740), (820, 25866), (958, 22140), (984, 21555), (1080, 19639), (1107, 19160), (1230, 17244), (1437, 14760), (1476, 14370), (1640, 12933), (1845, 11496), (1916, 11070), (2214, 9580), (2395, 8856), (2460, 8622), (2874, 7380), (2952, 7185), (3690, 5748), (3832, 5535), (4311, 4920), (4428, 4790)]