25681000

素因数分解:

$2^3\times 5^3\times {\mathrm{61}}^1\times {\mathrm{421}}^1$

素因数の和:503

約数の個数: 64

約数和(自身を含む): 61223760

約数和(自身を除く): 35542760

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 61, 100, 122, 125, 200, 244, 250, 305, 421, 488, 500, 610, 842, 1000, 1220, 1525, 1684, 2105, 2440, 3050, 3368, 4210, 6100, 7625, 8420, 10525, 12200, 15250, 16840, 21050, 25681, 30500, 42100, 51362, 52625, 61000, 84200, 102724, 105250, 128405, 205448, 210500, 256810, 421000, 513620, 642025, 1027240, 1284050, 2568100, 3210125, 5136200, 6420250, 12840500, 25681000]

約数ペア:

[(1, 25681000), (2, 12840500), (4, 6420250), (5, 5136200), (8, 3210125), (10, 2568100), (20, 1284050), (25, 1027240), (40, 642025), (50, 513620), (61, 421000), (100, 256810), (122, 210500), (125, 205448), (200, 128405), (244, 105250), (250, 102724), (305, 84200), (421, 61000), (488, 52625), (500, 51362), (610, 42100), (842, 30500), (1000, 25681), (1220, 21050), (1525, 16840), (1684, 15250), (2105, 12200), (2440, 10525), (3050, 8420), (3368, 7625), (4210, 6100)]