21462075

素因数分解:

$3^2\times 5^2\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{181}}^1$

素因数の和:245

約数の個数: 72

約数和(自身を含む): 42247296

約数和(自身を除く): 20785221

約数列:

[1, 3, 5, 9, 15, 17, 25, 31, 45, 51, 75, 85, 93, 153, 155, 181, 225, 255, 279, 425, 465, 527, 543, 765, 775, 905, 1275, 1395, 1581, 1629, 2325, 2635, 2715, 3077, 3825, 4525, 4743, 5611, 6975, 7905, 8145, 9231, 13175, 13575, 15385, 16833, 23715, 27693, 28055, 39525, 40725, 46155, 50499, 76925, 84165, 95387, 118575, 138465, 140275, 230775, 252495, 286161, 420825, 476935, 692325, 858483, 1262475, 1430805, 2384675, 4292415, 7154025, 21462075]

約数ペア:

[(1, 21462075), (3, 7154025), (5, 4292415), (9, 2384675), (15, 1430805), (17, 1262475), (25, 858483), (31, 692325), (45, 476935), (51, 420825), (75, 286161), (85, 252495), (93, 230775), (153, 140275), (155, 138465), (181, 118575), (225, 95387), (255, 84165), (279, 76925), (425, 50499), (465, 46155), (527, 40725), (543, 39525), (765, 28055), (775, 27693), (905, 23715), (1275, 16833), (1395, 15385), (1581, 13575), (1629, 13175), (2325, 9231), (2635, 8145), (2715, 7905), (3077, 6975), (3825, 5611), (4525, 4743)]