18937880

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{461}}^1$

素因数の和:564

約数の個数: 64

約数和(自身を含む): 46569600

約数和(自身を除く): 27631720

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 79, 104, 130, 158, 260, 316, 395, 461, 520, 632, 790, 922, 1027, 1580, 1844, 2054, 2305, 3160, 3688, 4108, 4610, 5135, 5993, 8216, 9220, 10270, 11986, 18440, 20540, 23972, 29965, 36419, 41080, 47944, 59930, 72838, 119860, 145676, 182095, 239720, 291352, 364190, 473447, 728380, 946894, 1456760, 1893788, 2367235, 3787576, 4734470, 9468940, 18937880]

約数ペア:

[(1, 18937880), (2, 9468940), (4, 4734470), (5, 3787576), (8, 2367235), (10, 1893788), (13, 1456760), (20, 946894), (26, 728380), (40, 473447), (52, 364190), (65, 291352), (79, 239720), (104, 182095), (130, 145676), (158, 119860), (260, 72838), (316, 59930), (395, 47944), (461, 41080), (520, 36419), (632, 29965), (790, 23972), (922, 20540), (1027, 18440), (1580, 11986), (1844, 10270), (2054, 9220), (2305, 8216), (3160, 5993), (3688, 5135), (4108, 4610)]