20719408

素因数分解:

$2^4\times {\mathrm{31}}^1\times {\mathrm{37}}^1\times {\mathrm{1129}}^1$

素因数の和:1205

約数の個数: 40

約数和(自身を含む): 42596480

約数和(自身を除く): 21877072

約数列:

[1, 2, 4, 8, 16, 31, 37, 62, 74, 124, 148, 248, 296, 496, 592, 1129, 1147, 2258, 2294, 4516, 4588, 9032, 9176, 18064, 18352, 34999, 41773, 69998, 83546, 139996, 167092, 279992, 334184, 559984, 668368, 1294963, 2589926, 5179852, 10359704, 20719408]

約数ペア:

[(1, 20719408), (2, 10359704), (4, 5179852), (8, 2589926), (16, 1294963), (31, 668368), (37, 559984), (62, 334184), (74, 279992), (124, 167092), (148, 139996), (248, 83546), (296, 69998), (496, 41773), (592, 34999), (1129, 18352), (1147, 18064), (2258, 9176), (2294, 9032), (4516, 4588)]