12840500

素因数分解:

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

素因数の和:501

約数の個数: 48

約数和(自身を含む): 28571088

約数和(自身を除く): 15730588

約数列:

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

約数ペア:

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