21804145

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{61}}^1\times {\mathrm{67}}^1\times {\mathrm{97}}^1$

素因数の和:241

約数の個数: 32

約数和(自身を含む): 29748096

約数和(自身を除く): 7943951

約数列:

[1, 5, 11, 55, 61, 67, 97, 305, 335, 485, 671, 737, 1067, 3355, 3685, 4087, 5335, 5917, 6499, 20435, 29585, 32495, 44957, 65087, 71489, 224785, 325435, 357445, 396439, 1982195, 4360829, 21804145]

約数ペア:

[(1, 21804145), (5, 4360829), (11, 1982195), (55, 396439), (61, 357445), (67, 325435), (97, 224785), (305, 71489), (335, 65087), (485, 44957), (671, 32495), (737, 29585), (1067, 20435), (3355, 6499), (3685, 5917), (4087, 5335)]