21686950

素因数分解:

$2^1\times 5^2\times {\mathrm{41}}^1\times {\mathrm{71}}^1\times {\mathrm{149}}^1$

素因数の和:273

約数の個数: 48

約数和(自身を含む): 42184800

約数和(自身を除く): 20497850

約数列:

[1, 2, 5, 10, 25, 41, 50, 71, 82, 142, 149, 205, 298, 355, 410, 710, 745, 1025, 1490, 1775, 2050, 2911, 3550, 3725, 5822, 6109, 7450, 10579, 12218, 14555, 21158, 29110, 30545, 52895, 61090, 72775, 105790, 145550, 152725, 264475, 305450, 433739, 528950, 867478, 2168695, 4337390, 10843475, 21686950]

約数ペア:

[(1, 21686950), (2, 10843475), (5, 4337390), (10, 2168695), (25, 867478), (41, 528950), (50, 433739), (71, 305450), (82, 264475), (142, 152725), (149, 145550), (205, 105790), (298, 72775), (355, 61090), (410, 52895), (710, 30545), (745, 29110), (1025, 21158), (1490, 14555), (1775, 12218), (2050, 10579), (2911, 7450), (3550, 6109), (3725, 5822)]