21550648

素因数分解:

$2^3\times 7^1\times {\mathrm{53}}^2\times {\mathrm{137}}^1$

素因数の和:256

約数の個数: 48

約数和(自身を含む): 47411280

約数和(自身を除く): 25860632

約数列:

[1, 2, 4, 7, 8, 14, 28, 53, 56, 106, 137, 212, 274, 371, 424, 548, 742, 959, 1096, 1484, 1918, 2809, 2968, 3836, 5618, 7261, 7672, 11236, 14522, 19663, 22472, 29044, 39326, 50827, 58088, 78652, 101654, 157304, 203308, 384833, 406616, 769666, 1539332, 2693831, 3078664, 5387662, 10775324, 21550648]

約数ペア:

[(1, 21550648), (2, 10775324), (4, 5387662), (7, 3078664), (8, 2693831), (14, 1539332), (28, 769666), (53, 406616), (56, 384833), (106, 203308), (137, 157304), (212, 101654), (274, 78652), (371, 58088), (424, 50827), (548, 39326), (742, 29044), (959, 22472), (1096, 19663), (1484, 14522), (1918, 11236), (2809, 7672), (2968, 7261), (3836, 5618)]