21107240

素因数分解:

$2^3\times 5^1\times 7^2\times {\mathrm{11}}^2\times {\mathrm{89}}^1$

素因数の和:136

約数の個数: 144

約数和(自身を含む): 61406100

約数和(自身を除く): 40298860

約数列:

[1, 2, 4, 5, 7, 8, 10, 11, 14, 20, 22, 28, 35, 40, 44, 49, 55, 56, 70, 77, 88, 89, 98, 110, 121, 140, 154, 178, 196, 220, 242, 245, 280, 308, 356, 385, 392, 440, 445, 484, 490, 539, 605, 616, 623, 712, 770, 847, 890, 968, 979, 980, 1078, 1210, 1246, 1540, 1694, 1780, 1958, 1960, 2156, 2420, 2492, 2695, 3080, 3115, 3388, 3560, 3916, 4235, 4312, 4361, 4840, 4895, 4984, 5390, 5929, 6230, 6776, 6853, 7832, 8470, 8722, 9790, 10769, 10780, 11858, 12460, 13706, 16940, 17444, 19580, 21538, 21560, 21805, 23716, 24920, 27412, 29645, 33880, 34265, 34888, 39160, 43076, 43610, 47432, 47971, 53845, 54824, 59290, 68530, 75383, 86152, 87220, 95942, 107690, 118580, 137060, 150766, 174440, 191884, 215380, 237160, 239855, 274120, 301532, 376915, 383768, 430760, 479710, 527681, 603064, 753830, 959420, 1055362, 1507660, 1918840, 2110724, 2638405, 3015320, 4221448, 5276810, 10553620, 21107240]

約数ペア:

[(1, 21107240), (2, 10553620), (4, 5276810), (5, 4221448), (7, 3015320), (8, 2638405), (10, 2110724), (11, 1918840), (14, 1507660), (20, 1055362), (22, 959420), (28, 753830), (35, 603064), (40, 527681), (44, 479710), (49, 430760), (55, 383768), (56, 376915), (70, 301532), (77, 274120), (88, 239855), (89, 237160), (98, 215380), (110, 191884), (121, 174440), (140, 150766), (154, 137060), (178, 118580), (196, 107690), (220, 95942), (242, 87220), (245, 86152), (280, 75383), (308, 68530), (356, 59290), (385, 54824), (392, 53845), (440, 47971), (445, 47432), (484, 43610), (490, 43076), (539, 39160), (605, 34888), (616, 34265), (623, 33880), (712, 29645), (770, 27412), (847, 24920), (890, 23716), (968, 21805), (979, 21560), (980, 21538), (1078, 19580), (1210, 17444), (1246, 16940), (1540, 13706), (1694, 12460), (1780, 11858), (1958, 10780), (1960, 10769), (2156, 9790), (2420, 8722), (2492, 8470), (2695, 7832), (3080, 6853), (3115, 6776), (3388, 6230), (3560, 5929), (3916, 5390), (4235, 4984), (4312, 4895), (4361, 4840)]