128367280

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{191}}^1\times {\mathrm{271}}^1$

素因数の和:506

約数の個数: 80

約数和(自身を含む): 310837248

約数和(自身を除く): 182469968

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 62, 80, 124, 155, 191, 248, 271, 310, 382, 496, 542, 620, 764, 955, 1084, 1240, 1355, 1528, 1910, 2168, 2480, 2710, 3056, 3820, 4336, 5420, 5921, 7640, 8401, 10840, 11842, 15280, 16802, 21680, 23684, 29605, 33604, 42005, 47368, 51761, 59210, 67208, 84010, 94736, 103522, 118420, 134416, 168020, 207044, 236840, 258805, 336040, 414088, 473680, 517610, 672080, 828176, 1035220, 1604591, 2070440, 3209182, 4140880, 6418364, 8022955, 12836728, 16045910, 25673456, 32091820, 64183640, 128367280]

約数ペア:

[(1, 128367280), (2, 64183640), (4, 32091820), (5, 25673456), (8, 16045910), (10, 12836728), (16, 8022955), (20, 6418364), (31, 4140880), (40, 3209182), (62, 2070440), (80, 1604591), (124, 1035220), (155, 828176), (191, 672080), (248, 517610), (271, 473680), (310, 414088), (382, 336040), (496, 258805), (542, 236840), (620, 207044), (764, 168020), (955, 134416), (1084, 118420), (1240, 103522), (1355, 94736), (1528, 84010), (1910, 67208), (2168, 59210), (2480, 51761), (2710, 47368), (3056, 42005), (3820, 33604), (4336, 29605), (5420, 23684), (5921, 21680), (7640, 16802), (8401, 15280), (10840, 11842)]