78661880

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{73}}^1\times {\mathrm{79}}^1$

素因数の和:205

約数の個数: 128

約数和(自身を含む): 204595200

約数和(自身を除く): 125933320

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 31, 40, 44, 55, 62, 73, 79, 88, 110, 124, 146, 155, 158, 220, 248, 292, 310, 316, 341, 365, 395, 440, 584, 620, 632, 682, 730, 790, 803, 869, 1240, 1364, 1460, 1580, 1606, 1705, 1738, 2263, 2449, 2728, 2920, 3160, 3212, 3410, 3476, 4015, 4345, 4526, 4898, 5767, 6424, 6820, 6952, 8030, 8690, 9052, 9796, 11315, 11534, 12245, 13640, 16060, 17380, 18104, 19592, 22630, 23068, 24490, 24893, 26939, 28835, 32120, 34760, 45260, 46136, 48980, 49786, 53878, 57670, 63437, 90520, 97960, 99572, 107756, 115340, 124465, 126874, 134695, 178777, 199144, 215512, 230680, 248930, 253748, 269390, 317185, 357554, 497860, 507496, 538780, 634370, 715108, 893885, 995720, 1077560, 1268740, 1430216, 1787770, 1966547, 2537480, 3575540, 3933094, 7151080, 7866188, 9832735, 15732376, 19665470, 39330940, 78661880]

約数ペア:

[(1, 78661880), (2, 39330940), (4, 19665470), (5, 15732376), (8, 9832735), (10, 7866188), (11, 7151080), (20, 3933094), (22, 3575540), (31, 2537480), (40, 1966547), (44, 1787770), (55, 1430216), (62, 1268740), (73, 1077560), (79, 995720), (88, 893885), (110, 715108), (124, 634370), (146, 538780), (155, 507496), (158, 497860), (220, 357554), (248, 317185), (292, 269390), (310, 253748), (316, 248930), (341, 230680), (365, 215512), (395, 199144), (440, 178777), (584, 134695), (620, 126874), (632, 124465), (682, 115340), (730, 107756), (790, 99572), (803, 97960), (869, 90520), (1240, 63437), (1364, 57670), (1460, 53878), (1580, 49786), (1606, 48980), (1705, 46136), (1738, 45260), (2263, 34760), (2449, 32120), (2728, 28835), (2920, 26939), (3160, 24893), (3212, 24490), (3410, 23068), (3476, 22630), (4015, 19592), (4345, 18104), (4526, 17380), (4898, 16060), (5767, 13640), (6424, 12245), (6820, 11534), (6952, 11315), (8030, 9796), (8690, 9052)]