20212515

素因数分解:

$3^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{59}}^1\times {\mathrm{331}}^1$

素因数の和:424

約数の個数: 48

約数和(自身を含む): 37290240

約数和(自身を除く): 17077725

約数列:

[1, 3, 5, 9, 15, 23, 45, 59, 69, 115, 177, 207, 295, 331, 345, 531, 885, 993, 1035, 1357, 1655, 2655, 2979, 4071, 4965, 6785, 7613, 12213, 14895, 19529, 20355, 22839, 38065, 58587, 61065, 68517, 97645, 114195, 175761, 292935, 342585, 449167, 878805, 1347501, 2245835, 4042503, 6737505, 20212515]

約数ペア:

[(1, 20212515), (3, 6737505), (5, 4042503), (9, 2245835), (15, 1347501), (23, 878805), (45, 449167), (59, 342585), (69, 292935), (115, 175761), (177, 114195), (207, 97645), (295, 68517), (331, 61065), (345, 58587), (531, 38065), (885, 22839), (993, 20355), (1035, 19529), (1357, 14895), (1655, 12213), (2655, 7613), (2979, 6785), (4071, 4965)]