21964275

素因数分解:

$3^2\times 5^2\times {\mathrm{31}}^1\times {\mathrm{47}}^1\times {\mathrm{67}}^1$

素因数の和:161

約数の個数: 72

約数和(自身を含む): 42092544

約数和(自身を除く): 20128269

約数列:

[1, 3, 5, 9, 15, 25, 31, 45, 47, 67, 75, 93, 141, 155, 201, 225, 235, 279, 335, 423, 465, 603, 705, 775, 1005, 1175, 1395, 1457, 1675, 2077, 2115, 2325, 3015, 3149, 3525, 4371, 5025, 6231, 6975, 7285, 9447, 10385, 10575, 13113, 15075, 15745, 18693, 21855, 28341, 31155, 36425, 47235, 51925, 65565, 78725, 93465, 97619, 109275, 141705, 155775, 236175, 292857, 327825, 467325, 488095, 708525, 878571, 1464285, 2440475, 4392855, 7321425, 21964275]

約数ペア:

[(1, 21964275), (3, 7321425), (5, 4392855), (9, 2440475), (15, 1464285), (25, 878571), (31, 708525), (45, 488095), (47, 467325), (67, 327825), (75, 292857), (93, 236175), (141, 155775), (155, 141705), (201, 109275), (225, 97619), (235, 93465), (279, 78725), (335, 65565), (423, 51925), (465, 47235), (603, 36425), (705, 31155), (775, 28341), (1005, 21855), (1175, 18693), (1395, 15745), (1457, 15075), (1675, 13113), (2077, 10575), (2115, 10385), (2325, 9447), (3015, 7285), (3149, 6975), (3525, 6231), (4371, 5025)]