21138402605

素因数分解:

$5^1\times {\mathrm{31}}^1\times {\mathrm{53}}^1\times {\mathrm{127}}^1\times {\mathrm{20261}}^1$

素因数の和:20477

約数の個数: 32

約数和(自身を含む): 26889781248

約数和(自身を除く): 5751378643

約数列:

[1, 5, 31, 53, 127, 155, 265, 635, 1643, 3937, 6731, 8215, 19685, 20261, 33655, 101305, 208661, 628091, 1043305, 1073833, 2573147, 3140455, 5369165, 12865735, 33288823, 79767557, 136376791, 166444115, 398837785, 681883955, 4227680521, 21138402605]

約数ペア:

[(1, 21138402605), (5, 4227680521), (31, 681883955), (53, 398837785), (127, 166444115), (155, 136376791), (265, 79767557), (635, 33288823), (1643, 12865735), (3937, 5369165), (6731, 3140455), (8215, 2573147), (19685, 1073833), (20261, 1043305), (33655, 628091), (101305, 208661)]