21204930

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{31}}^1\times {\mathrm{151}}^2$

素因数の和:343

約数の個数: 48

約数和(自身を含む): 52883712

約数和(自身を除く): 31678782

約数列:

[1, 2, 3, 5, 6, 10, 15, 30, 31, 62, 93, 151, 155, 186, 302, 310, 453, 465, 755, 906, 930, 1510, 2265, 4530, 4681, 9362, 14043, 22801, 23405, 28086, 45602, 46810, 68403, 70215, 114005, 136806, 140430, 228010, 342015, 684030, 706831, 1413662, 2120493, 3534155, 4240986, 7068310, 10602465, 21204930]

約数ペア:

[(1, 21204930), (2, 10602465), (3, 7068310), (5, 4240986), (6, 3534155), (10, 2120493), (15, 1413662), (30, 706831), (31, 684030), (62, 342015), (93, 228010), (151, 140430), (155, 136806), (186, 114005), (302, 70215), (310, 68403), (453, 46810), (465, 45602), (755, 28086), (906, 23405), (930, 22801), (1510, 14043), (2265, 9362), (4530, 4681)]