20396740

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{1601}}^1$

素因数の和:1637

約数の個数: 72

約数和(自身を含む): 53692632

約数和(自身を除く): 33295892

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 26, 28, 35, 49, 52, 65, 70, 91, 98, 130, 140, 182, 196, 245, 260, 364, 455, 490, 637, 910, 980, 1274, 1601, 1820, 2548, 3185, 3202, 6370, 6404, 8005, 11207, 12740, 16010, 20813, 22414, 32020, 41626, 44828, 56035, 78449, 83252, 104065, 112070, 145691, 156898, 208130, 224140, 291382, 313796, 392245, 416260, 582764, 728455, 784490, 1019837, 1456910, 1568980, 2039674, 2913820, 4079348, 5099185, 10198370, 20396740]

約数ペア:

[(1, 20396740), (2, 10198370), (4, 5099185), (5, 4079348), (7, 2913820), (10, 2039674), (13, 1568980), (14, 1456910), (20, 1019837), (26, 784490), (28, 728455), (35, 582764), (49, 416260), (52, 392245), (65, 313796), (70, 291382), (91, 224140), (98, 208130), (130, 156898), (140, 145691), (182, 112070), (196, 104065), (245, 83252), (260, 78449), (364, 56035), (455, 44828), (490, 41626), (637, 32020), (910, 22414), (980, 20813), (1274, 16010), (1601, 12740), (1820, 11207), (2548, 8005), (3185, 6404), (3202, 6370)]