21099715

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{587}}^1$

素因数の和:691

約数の個数: 32

約数和(自身を含む): 31610880

約数和(自身を除く): 10511165

約数列:

[1, 5, 7, 13, 35, 65, 79, 91, 395, 455, 553, 587, 1027, 2765, 2935, 4109, 5135, 7189, 7631, 20545, 35945, 38155, 46373, 53417, 231865, 267085, 324611, 602849, 1623055, 3014245, 4219943, 21099715]

約数ペア:

[(1, 21099715), (5, 4219943), (7, 3014245), (13, 1623055), (35, 602849), (65, 324611), (79, 267085), (91, 231865), (395, 53417), (455, 46373), (553, 38155), (587, 35945), (1027, 20545), (2765, 7631), (2935, 7189), (4109, 5135)]