21366320

素因数分解:

$2^4\times 5^1\times {\mathrm{103}}^1\times {\mathrm{2593}}^1$

素因数の和:2709

約数の個数: 40

約数和(自身を含む): 50178336

約数和(自身を除く): 28812016

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 103, 206, 412, 515, 824, 1030, 1648, 2060, 2593, 4120, 5186, 8240, 10372, 12965, 20744, 25930, 41488, 51860, 103720, 207440, 267079, 534158, 1068316, 1335395, 2136632, 2670790, 4273264, 5341580, 10683160, 21366320]

約数ペア:

[(1, 21366320), (2, 10683160), (4, 5341580), (5, 4273264), (8, 2670790), (10, 2136632), (16, 1335395), (20, 1068316), (40, 534158), (80, 267079), (103, 207440), (206, 103720), (412, 51860), (515, 41488), (824, 25930), (1030, 20744), (1648, 12965), (2060, 10372), (2593, 8240), (4120, 5186)]