21241220

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{1061}}^1$

素因数の和:1101

約数の個数: 96

約数和(自身を含む): 59947776

約数和(自身を除く): 38706556

約数列:

[1, 2, 4, 5, 7, 10, 11, 13, 14, 20, 22, 26, 28, 35, 44, 52, 55, 65, 70, 77, 91, 110, 130, 140, 143, 154, 182, 220, 260, 286, 308, 364, 385, 455, 572, 715, 770, 910, 1001, 1061, 1430, 1540, 1820, 2002, 2122, 2860, 4004, 4244, 5005, 5305, 7427, 10010, 10610, 11671, 13793, 14854, 20020, 21220, 23342, 27586, 29708, 37135, 46684, 55172, 58355, 68965, 74270, 81697, 96551, 116710, 137930, 148540, 151723, 163394, 193102, 233420, 275860, 303446, 326788, 386204, 408485, 482755, 606892, 758615, 816970, 965510, 1062061, 1517230, 1633940, 1931020, 2124122, 3034460, 4248244, 5310305, 10620610, 21241220]

約数ペア:

[(1, 21241220), (2, 10620610), (4, 5310305), (5, 4248244), (7, 3034460), (10, 2124122), (11, 1931020), (13, 1633940), (14, 1517230), (20, 1062061), (22, 965510), (26, 816970), (28, 758615), (35, 606892), (44, 482755), (52, 408485), (55, 386204), (65, 326788), (70, 303446), (77, 275860), (91, 233420), (110, 193102), (130, 163394), (140, 151723), (143, 148540), (154, 137930), (182, 116710), (220, 96551), (260, 81697), (286, 74270), (308, 68965), (364, 58355), (385, 55172), (455, 46684), (572, 37135), (715, 29708), (770, 27586), (910, 23342), (1001, 21220), (1061, 20020), (1430, 14854), (1540, 13793), (1820, 11671), (2002, 10610), (2122, 10010), (2860, 7427), (4004, 5305), (4244, 5005)]