21642556

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{6823}}^1$

素因数の和:6901

約数の個数: 24

約数和(自身を含む): 41462624

約数和(自身を除く): 19820068

約数列:

[1, 2, 4, 13, 26, 52, 61, 122, 244, 793, 1586, 3172, 6823, 13646, 27292, 88699, 177398, 354796, 416203, 832406, 1664812, 5410639, 10821278, 21642556]

約数ペア:

[(1, 21642556), (2, 10821278), (4, 5410639), (13, 1664812), (26, 832406), (52, 416203), (61, 354796), (122, 177398), (244, 88699), (793, 27292), (1586, 13646), (3172, 6823)]