81774160

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{1289}}^1$

素因数の和:1376

約数の個数: 80

約数和(自身を含む): 208267920

約数和(自身を除く): 126493760

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 61, 65, 80, 104, 122, 130, 208, 244, 260, 305, 488, 520, 610, 793, 976, 1040, 1220, 1289, 1586, 2440, 2578, 3172, 3965, 4880, 5156, 6344, 6445, 7930, 10312, 12688, 12890, 15860, 16757, 20624, 25780, 31720, 33514, 51560, 63440, 67028, 78629, 83785, 103120, 134056, 157258, 167570, 268112, 314516, 335140, 393145, 629032, 670280, 786290, 1022177, 1258064, 1340560, 1572580, 2044354, 3145160, 4088708, 5110885, 6290320, 8177416, 10221770, 16354832, 20443540, 40887080, 81774160]

約数ペア:

[(1, 81774160), (2, 40887080), (4, 20443540), (5, 16354832), (8, 10221770), (10, 8177416), (13, 6290320), (16, 5110885), (20, 4088708), (26, 3145160), (40, 2044354), (52, 1572580), (61, 1340560), (65, 1258064), (80, 1022177), (104, 786290), (122, 670280), (130, 629032), (208, 393145), (244, 335140), (260, 314516), (305, 268112), (488, 167570), (520, 157258), (610, 134056), (793, 103120), (976, 83785), (1040, 78629), (1220, 67028), (1289, 63440), (1586, 51560), (2440, 33514), (2578, 31720), (3172, 25780), (3965, 20624), (4880, 16757), (5156, 15860), (6344, 12890), (6445, 12688), (7930, 10312)]