20979632

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{137}}^1\times {\mathrm{563}}^1$

素因数の和:725

約数の個数: 40

約数和(自身を含む): 43430256

約数和(自身を除く): 22450624

約数列:

[1, 2, 4, 8, 16, 17, 34, 68, 136, 137, 272, 274, 548, 563, 1096, 1126, 2192, 2252, 2329, 4504, 4658, 9008, 9316, 9571, 18632, 19142, 37264, 38284, 76568, 77131, 153136, 154262, 308524, 617048, 1234096, 1311227, 2622454, 5244908, 10489816, 20979632]

約数ペア:

[(1, 20979632), (2, 10489816), (4, 5244908), (8, 2622454), (16, 1311227), (17, 1234096), (34, 617048), (68, 308524), (136, 154262), (137, 153136), (272, 77131), (274, 76568), (548, 38284), (563, 37264), (1096, 19142), (1126, 18632), (2192, 9571), (2252, 9316), (2329, 9008), (4504, 4658)]