20456775

素因数分解:

$3^2\times 5^2\times {\mathrm{23}}^1\times {\mathrm{59}}^1\times {\mathrm{67}}^1$

素因数の和:165

約数の個数: 72

約数和(自身を含む): 39461760

約数和(自身を除く): 19004985

約数列:

[1, 3, 5, 9, 15, 23, 25, 45, 59, 67, 69, 75, 115, 177, 201, 207, 225, 295, 335, 345, 531, 575, 603, 885, 1005, 1035, 1357, 1475, 1541, 1675, 1725, 2655, 3015, 3953, 4071, 4425, 4623, 5025, 5175, 6785, 7705, 11859, 12213, 13275, 13869, 15075, 19765, 20355, 23115, 33925, 35577, 38525, 59295, 61065, 69345, 90919, 98825, 101775, 115575, 177885, 272757, 296475, 305325, 346725, 454595, 818271, 889425, 1363785, 2272975, 4091355, 6818925, 20456775]

約数ペア:

[(1, 20456775), (3, 6818925), (5, 4091355), (9, 2272975), (15, 1363785), (23, 889425), (25, 818271), (45, 454595), (59, 346725), (67, 305325), (69, 296475), (75, 272757), (115, 177885), (177, 115575), (201, 101775), (207, 98825), (225, 90919), (295, 69345), (335, 61065), (345, 59295), (531, 38525), (575, 35577), (603, 33925), (885, 23115), (1005, 20355), (1035, 19765), (1357, 15075), (1475, 13869), (1541, 13275), (1675, 12213), (1725, 11859), (2655, 7705), (3015, 6785), (3953, 5175), (4071, 5025), (4425, 4623)]