21767240

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{61}}^1\times {\mathrm{811}}^1$

素因数の和:894

約数の個数: 64

約数和(自身を含む): 54371520

約数和(自身を除く): 32604280

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 61, 88, 110, 122, 220, 244, 305, 440, 488, 610, 671, 811, 1220, 1342, 1622, 2440, 2684, 3244, 3355, 4055, 5368, 6488, 6710, 8110, 8921, 13420, 16220, 17842, 26840, 32440, 35684, 44605, 49471, 71368, 89210, 98942, 178420, 197884, 247355, 356840, 395768, 494710, 544181, 989420, 1088362, 1978840, 2176724, 2720905, 4353448, 5441810, 10883620, 21767240]

約数ペア:

[(1, 21767240), (2, 10883620), (4, 5441810), (5, 4353448), (8, 2720905), (10, 2176724), (11, 1978840), (20, 1088362), (22, 989420), (40, 544181), (44, 494710), (55, 395768), (61, 356840), (88, 247355), (110, 197884), (122, 178420), (220, 98942), (244, 89210), (305, 71368), (440, 49471), (488, 44605), (610, 35684), (671, 32440), (811, 26840), (1220, 17842), (1342, 16220), (1622, 13420), (2440, 8921), (2684, 8110), (3244, 6710), (3355, 6488), (4055, 5368)]