20964940

素因数分解:

$2^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{41}}^1\times {\mathrm{691}}^1$

素因数の和:778

約数の個数: 48

約数和(自身を含む): 46386144

約数和(自身を除く): 25421204

約数列:

[1, 2, 4, 5, 10, 20, 37, 41, 74, 82, 148, 164, 185, 205, 370, 410, 691, 740, 820, 1382, 1517, 2764, 3034, 3455, 6068, 6910, 7585, 13820, 15170, 25567, 28331, 30340, 51134, 56662, 102268, 113324, 127835, 141655, 255670, 283310, 511340, 566620, 1048247, 2096494, 4192988, 5241235, 10482470, 20964940]

約数ペア:

[(1, 20964940), (2, 10482470), (4, 5241235), (5, 4192988), (10, 2096494), (20, 1048247), (37, 566620), (41, 511340), (74, 283310), (82, 255670), (148, 141655), (164, 127835), (185, 113324), (205, 102268), (370, 56662), (410, 51134), (691, 30340), (740, 28331), (820, 25567), (1382, 15170), (1517, 13820), (2764, 7585), (3034, 6910), (3455, 6068)]