21507804

素因数分解:

$2^2\times 3^2\times {\mathrm{37}}^1\times {\mathrm{67}}^1\times {\mathrm{241}}^1$

素因数の和:355

約数の個数: 72

約数和(自身を含む): 56904848

約数和(自身を除く): 35397044

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 36, 37, 67, 74, 111, 134, 148, 201, 222, 241, 268, 333, 402, 444, 482, 603, 666, 723, 804, 964, 1206, 1332, 1446, 2169, 2412, 2479, 2892, 4338, 4958, 7437, 8676, 8917, 9916, 14874, 16147, 17834, 22311, 26751, 29748, 32294, 35668, 44622, 48441, 53502, 64588, 80253, 89244, 96882, 107004, 145323, 160506, 193764, 290646, 321012, 581292, 597439, 1194878, 1792317, 2389756, 3584634, 5376951, 7169268, 10753902, 21507804]

約数ペア:

[(1, 21507804), (2, 10753902), (3, 7169268), (4, 5376951), (6, 3584634), (9, 2389756), (12, 1792317), (18, 1194878), (36, 597439), (37, 581292), (67, 321012), (74, 290646), (111, 193764), (134, 160506), (148, 145323), (201, 107004), (222, 96882), (241, 89244), (268, 80253), (333, 64588), (402, 53502), (444, 48441), (482, 44622), (603, 35668), (666, 32294), (723, 29748), (804, 26751), (964, 22311), (1206, 17834), (1332, 16147), (1446, 14874), (2169, 9916), (2412, 8917), (2479, 8676), (2892, 7437), (4338, 4958)]