21857325

素因数分解:

$3^1\times 5^2\times 7^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{79}}^1$

素因数の和:147

約数の個数: 96

約数和(自身を含む): 45711360

約数和(自身を除く): 23854035

約数列:

[1, 3, 5, 7, 15, 17, 21, 25, 31, 35, 51, 75, 79, 85, 93, 105, 119, 155, 175, 217, 237, 255, 357, 395, 425, 465, 525, 527, 553, 595, 651, 775, 1085, 1185, 1275, 1343, 1581, 1659, 1785, 1975, 2325, 2449, 2635, 2765, 2975, 3255, 3689, 4029, 5425, 5925, 6715, 7347, 7905, 8295, 8925, 9401, 11067, 12245, 13175, 13825, 16275, 17143, 18445, 20145, 28203, 33575, 36735, 39525, 41475, 41633, 47005, 51429, 55335, 61225, 85715, 92225, 100725, 124899, 141015, 183675, 208165, 235025, 257145, 276675, 291431, 428575, 624495, 705075, 874293, 1040825, 1285725, 1457155, 3122475, 4371465, 7285775, 21857325]

約数ペア:

[(1, 21857325), (3, 7285775), (5, 4371465), (7, 3122475), (15, 1457155), (17, 1285725), (21, 1040825), (25, 874293), (31, 705075), (35, 624495), (51, 428575), (75, 291431), (79, 276675), (85, 257145), (93, 235025), (105, 208165), (119, 183675), (155, 141015), (175, 124899), (217, 100725), (237, 92225), (255, 85715), (357, 61225), (395, 55335), (425, 51429), (465, 47005), (525, 41633), (527, 41475), (553, 39525), (595, 36735), (651, 33575), (775, 28203), (1085, 20145), (1185, 18445), (1275, 17143), (1343, 16275), (1581, 13825), (1659, 13175), (1785, 12245), (1975, 11067), (2325, 9401), (2449, 8925), (2635, 8295), (2765, 7905), (2975, 7347), (3255, 6715), (3689, 5925), (4029, 5425)]