21685460

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{149}}^1\times {\mathrm{383}}^1$

素因数の和:560

約数の個数: 48

約数和(自身を含む): 48384000

約数和(自身を除く): 26698540

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 149, 190, 298, 380, 383, 596, 745, 766, 1490, 1532, 1915, 2831, 2980, 3830, 5662, 7277, 7660, 11324, 14155, 14554, 28310, 29108, 36385, 56620, 57067, 72770, 114134, 145540, 228268, 285335, 570670, 1084273, 1141340, 2168546, 4337092, 5421365, 10842730, 21685460]

約数ペア:

[(1, 21685460), (2, 10842730), (4, 5421365), (5, 4337092), (10, 2168546), (19, 1141340), (20, 1084273), (38, 570670), (76, 285335), (95, 228268), (149, 145540), (190, 114134), (298, 72770), (380, 57067), (383, 56620), (596, 36385), (745, 29108), (766, 28310), (1490, 14554), (1532, 14155), (1915, 11324), (2831, 7660), (2980, 7277), (3830, 5662)]