21684208

素因数分解:

$2^4\times 7^1\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{281}}^1$

素因数の和:362

約数の個数: 80

約数和(自身を含む): 52871616

約数和(自身を除く): 31187408

約数列:

[1, 2, 4, 7, 8, 13, 14, 16, 26, 28, 52, 53, 56, 91, 104, 106, 112, 182, 208, 212, 281, 364, 371, 424, 562, 689, 728, 742, 848, 1124, 1378, 1456, 1484, 1967, 2248, 2756, 2968, 3653, 3934, 4496, 4823, 5512, 5936, 7306, 7868, 9646, 11024, 14612, 14893, 15736, 19292, 25571, 29224, 29786, 31472, 38584, 51142, 58448, 59572, 77168, 102284, 104251, 119144, 193609, 204568, 208502, 238288, 387218, 409136, 417004, 774436, 834008, 1355263, 1548872, 1668016, 2710526, 3097744, 5421052, 10842104, 21684208]

約数ペア:

[(1, 21684208), (2, 10842104), (4, 5421052), (7, 3097744), (8, 2710526), (13, 1668016), (14, 1548872), (16, 1355263), (26, 834008), (28, 774436), (52, 417004), (53, 409136), (56, 387218), (91, 238288), (104, 208502), (106, 204568), (112, 193609), (182, 119144), (208, 104251), (212, 102284), (281, 77168), (364, 59572), (371, 58448), (424, 51142), (562, 38584), (689, 31472), (728, 29786), (742, 29224), (848, 25571), (1124, 19292), (1378, 15736), (1456, 14893), (1484, 14612), (1967, 11024), (2248, 9646), (2756, 7868), (2968, 7306), (3653, 5936), (3934, 5512), (4496, 4823)]