78487660

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{71}}^1\times {\mathrm{1783}}^1$

素因数の和:1894

約数の個数: 48

約数和(自身を含む): 172634112

約数和(自身を除く): 94146452

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 71, 124, 142, 155, 284, 310, 355, 620, 710, 1420, 1783, 2201, 3566, 4402, 7132, 8804, 8915, 11005, 17830, 22010, 35660, 44020, 55273, 110546, 126593, 221092, 253186, 276365, 506372, 552730, 632965, 1105460, 1265930, 2531860, 3924383, 7848766, 15697532, 19621915, 39243830, 78487660]

約数ペア:

[(1, 78487660), (2, 39243830), (4, 19621915), (5, 15697532), (10, 7848766), (20, 3924383), (31, 2531860), (62, 1265930), (71, 1105460), (124, 632965), (142, 552730), (155, 506372), (284, 276365), (310, 253186), (355, 221092), (620, 126593), (710, 110546), (1420, 55273), (1783, 44020), (2201, 35660), (3566, 22010), (4402, 17830), (7132, 11005), (8804, 8915)]