21536405

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{557}}^1$

素因数の和:629

約数の個数: 32

約数和(自身を含む): 30533760

約数和(自身を除く): 8997355

約数列:

[1, 5, 11, 19, 37, 55, 95, 185, 209, 407, 557, 703, 1045, 2035, 2785, 3515, 6127, 7733, 10583, 20609, 30635, 38665, 52915, 103045, 116413, 226699, 391571, 582065, 1133495, 1957855, 4307281, 21536405]

約数ペア:

[(1, 21536405), (5, 4307281), (11, 1957855), (19, 1133495), (37, 582065), (55, 391571), (95, 226699), (185, 116413), (209, 103045), (407, 52915), (557, 38665), (703, 30635), (1045, 20609), (2035, 10583), (2785, 7733), (3515, 6127)]