20664352

素因数分解:

$2^5\times {\mathrm{31}}^1\times {\mathrm{37}}^1\times {\mathrm{563}}^1$

素因数の和:641

約数の個数: 48

約数和(自身を含む): 43206912

約数和(自身を除く): 22542560

約数列:

[1, 2, 4, 8, 16, 31, 32, 37, 62, 74, 124, 148, 248, 296, 496, 563, 592, 992, 1126, 1147, 1184, 2252, 2294, 4504, 4588, 9008, 9176, 17453, 18016, 18352, 20831, 34906, 36704, 41662, 69812, 83324, 139624, 166648, 279248, 333296, 558496, 645761, 666592, 1291522, 2583044, 5166088, 10332176, 20664352]

約数ペア:

[(1, 20664352), (2, 10332176), (4, 5166088), (8, 2583044), (16, 1291522), (31, 666592), (32, 645761), (37, 558496), (62, 333296), (74, 279248), (124, 166648), (148, 139624), (248, 83324), (296, 69812), (496, 41662), (563, 36704), (592, 34906), (992, 20831), (1126, 18352), (1147, 18016), (1184, 17453), (2252, 9176), (2294, 9008), (4504, 4588)]