21456750

素因数分解:

$2^1\times 3^1\times 5^3\times 7^1\times {\mathrm{61}}^1\times {\mathrm{67}}^1$

素因数の和:155

約数の個数: 128

約数和(自身を含む): 63138816

約数和(自身を除く): 41682066

約数列:

[1, 2, 3, 5, 6, 7, 10, 14, 15, 21, 25, 30, 35, 42, 50, 61, 67, 70, 75, 105, 122, 125, 134, 150, 175, 183, 201, 210, 250, 305, 335, 350, 366, 375, 402, 427, 469, 525, 610, 670, 750, 854, 875, 915, 938, 1005, 1050, 1281, 1407, 1525, 1675, 1750, 1830, 2010, 2135, 2345, 2562, 2625, 2814, 3050, 3350, 4087, 4270, 4575, 4690, 5025, 5250, 6405, 7035, 7625, 8174, 8375, 9150, 10050, 10675, 11725, 12261, 12810, 14070, 15250, 16750, 20435, 21350, 22875, 23450, 24522, 25125, 28609, 32025, 35175, 40870, 45750, 50250, 53375, 57218, 58625, 61305, 64050, 70350, 85827, 102175, 106750, 117250, 122610, 143045, 160125, 171654, 175875, 204350, 286090, 306525, 320250, 351750, 429135, 510875, 613050, 715225, 858270, 1021750, 1430450, 1532625, 2145675, 3065250, 3576125, 4291350, 7152250, 10728375, 21456750]

約数ペア:

[(1, 21456750), (2, 10728375), (3, 7152250), (5, 4291350), (6, 3576125), (7, 3065250), (10, 2145675), (14, 1532625), (15, 1430450), (21, 1021750), (25, 858270), (30, 715225), (35, 613050), (42, 510875), (50, 429135), (61, 351750), (67, 320250), (70, 306525), (75, 286090), (105, 204350), (122, 175875), (125, 171654), (134, 160125), (150, 143045), (175, 122610), (183, 117250), (201, 106750), (210, 102175), (250, 85827), (305, 70350), (335, 64050), (350, 61305), (366, 58625), (375, 57218), (402, 53375), (427, 50250), (469, 45750), (525, 40870), (610, 35175), (670, 32025), (750, 28609), (854, 25125), (875, 24522), (915, 23450), (938, 22875), (1005, 21350), (1050, 20435), (1281, 16750), (1407, 15250), (1525, 14070), (1675, 12810), (1750, 12261), (1830, 11725), (2010, 10675), (2135, 10050), (2345, 9150), (2562, 8375), (2625, 8174), (2814, 7625), (3050, 7035), (3350, 6405), (4087, 5250), (4270, 5025), (4575, 4690)]