20872796

素因数分解:

$2^2\times 7^1\times {\mathrm{31}}^1\times {\mathrm{139}}^1\times {\mathrm{173}}^1$

素因数の和:354

約数の個数: 48

約数和(自身を含む): 43653120

約数和(自身を除く): 22780324

約数列:

[1, 2, 4, 7, 14, 28, 31, 62, 124, 139, 173, 217, 278, 346, 434, 556, 692, 868, 973, 1211, 1946, 2422, 3892, 4309, 4844, 5363, 8618, 10726, 17236, 21452, 24047, 30163, 37541, 48094, 60326, 75082, 96188, 120652, 150164, 168329, 336658, 673316, 745457, 1490914, 2981828, 5218199, 10436398, 20872796]

約数ペア:

[(1, 20872796), (2, 10436398), (4, 5218199), (7, 2981828), (14, 1490914), (28, 745457), (31, 673316), (62, 336658), (124, 168329), (139, 150164), (173, 120652), (217, 96188), (278, 75082), (346, 60326), (434, 48094), (556, 37541), (692, 30163), (868, 24047), (973, 21452), (1211, 17236), (1946, 10726), (2422, 8618), (3892, 5363), (4309, 4844)]