21535855

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{743}}^1$

素因数の和:807

約数の個数: 32

約数和(自身を含む): 30855168

約数和(自身を除く): 9319313

約数列:

[1, 5, 11, 17, 31, 55, 85, 155, 187, 341, 527, 743, 935, 1705, 2635, 3715, 5797, 8173, 12631, 23033, 28985, 40865, 63155, 115165, 138941, 253363, 391561, 694705, 1266815, 1957805, 4307171, 21535855]

約数ペア:

[(1, 21535855), (5, 4307171), (11, 1957805), (17, 1266815), (31, 694705), (55, 391561), (85, 253363), (155, 138941), (187, 115165), (341, 63155), (527, 40865), (743, 28985), (935, 23033), (1705, 12631), (2635, 8173), (3715, 5797)]