20978990

素因数分解:

$2^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{53}}^1\times {\mathrm{1721}}^1$

素因数の和:1804

約数の個数: 32

約数和(自身を含む): 40170816

約数和(自身を除く): 19191826

約数列:

[1, 2, 5, 10, 23, 46, 53, 106, 115, 230, 265, 530, 1219, 1721, 2438, 3442, 6095, 8605, 12190, 17210, 39583, 79166, 91213, 182426, 197915, 395830, 456065, 912130, 2097899, 4195798, 10489495, 20978990]

約数ペア:

[(1, 20978990), (2, 10489495), (5, 4195798), (10, 2097899), (23, 912130), (46, 456065), (53, 395830), (106, 197915), (115, 182426), (230, 91213), (265, 79166), (530, 39583), (1219, 17210), (1721, 12190), (2438, 8605), (3442, 6095)]