51981020

素因数分解:

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

素因数の和:81

約数の個数: 72

約数和(自身を含む): 135150624

約数和(自身を除く): 83169604

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 26, 28, 35, 52, 65, 70, 91, 130, 140, 169, 182, 260, 338, 364, 455, 676, 845, 910, 1183, 1690, 1820, 2197, 2366, 3380, 4394, 4732, 5915, 8788, 10985, 11830, 15379, 21970, 23660, 28561, 30758, 43940, 57122, 61516, 76895, 114244, 142805, 153790, 199927, 285610, 307580, 371293, 399854, 571220, 742586, 799708, 999635, 1485172, 1856465, 1999270, 2599051, 3712930, 3998540, 5198102, 7425860, 10396204, 12995255, 25990510, 51981020]

約数ペア:

[(1, 51981020), (2, 25990510), (4, 12995255), (5, 10396204), (7, 7425860), (10, 5198102), (13, 3998540), (14, 3712930), (20, 2599051), (26, 1999270), (28, 1856465), (35, 1485172), (52, 999635), (65, 799708), (70, 742586), (91, 571220), (130, 399854), (140, 371293), (169, 307580), (182, 285610), (260, 199927), (338, 153790), (364, 142805), (455, 114244), (676, 76895), (845, 61516), (910, 57122), (1183, 43940), (1690, 30758), (1820, 28561), (2197, 23660), (2366, 21970), (3380, 15379), (4394, 11830), (4732, 10985), (5915, 8788)]