64202500

素因数分解:

$2^2\times 5^4\times {\mathrm{61}}^1\times {\mathrm{421}}^1$

素因数の和:506

約数の個数: 60

約数和(自身を含む): 143038588

約数和(自身を除く): 78836088

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 61, 100, 122, 125, 244, 250, 305, 421, 500, 610, 625, 842, 1220, 1250, 1525, 1684, 2105, 2500, 3050, 4210, 6100, 7625, 8420, 10525, 15250, 21050, 25681, 30500, 38125, 42100, 51362, 52625, 76250, 102724, 105250, 128405, 152500, 210500, 256810, 263125, 513620, 526250, 642025, 1052500, 1284050, 2568100, 3210125, 6420250, 12840500, 16050625, 32101250, 64202500]

約数ペア:

[(1, 64202500), (2, 32101250), (4, 16050625), (5, 12840500), (10, 6420250), (20, 3210125), (25, 2568100), (50, 1284050), (61, 1052500), (100, 642025), (122, 526250), (125, 513620), (244, 263125), (250, 256810), (305, 210500), (421, 152500), (500, 128405), (610, 105250), (625, 102724), (842, 76250), (1220, 52625), (1250, 51362), (1525, 42100), (1684, 38125), (2105, 30500), (2500, 25681), (3050, 21050), (4210, 15250), (6100, 10525), (7625, 8420)]