20018895

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^2\times {\mathrm{53}}^1\times {\mathrm{149}}^1$

素因数の和:236

約数の個数: 48

約数和(自身を含む): 35575200

約数和(自身を除く): 15556305

約数列:

[1, 3, 5, 13, 15, 39, 53, 65, 149, 159, 169, 195, 265, 447, 507, 689, 745, 795, 845, 1937, 2067, 2235, 2535, 3445, 5811, 7897, 8957, 9685, 10335, 23691, 25181, 26871, 29055, 39485, 44785, 75543, 102661, 118455, 125905, 134355, 307983, 377715, 513305, 1334593, 1539915, 4003779, 6672965, 20018895]

約数ペア:

[(1, 20018895), (3, 6672965), (5, 4003779), (13, 1539915), (15, 1334593), (39, 513305), (53, 377715), (65, 307983), (149, 134355), (159, 125905), (169, 118455), (195, 102661), (265, 75543), (447, 44785), (507, 39485), (689, 29055), (745, 26871), (795, 25181), (845, 23691), (1937, 10335), (2067, 9685), (2235, 8957), (2535, 7897), (3445, 5811)]