20443280

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{1787}}^1$

素因数の和:1824

約数の個数: 80

約数和(自身を含む): 55871424

約数和(自身を除く): 35428144

約数列:

[1, 2, 4, 5, 8, 10, 11, 13, 16, 20, 22, 26, 40, 44, 52, 55, 65, 80, 88, 104, 110, 130, 143, 176, 208, 220, 260, 286, 440, 520, 572, 715, 880, 1040, 1144, 1430, 1787, 2288, 2860, 3574, 5720, 7148, 8935, 11440, 14296, 17870, 19657, 23231, 28592, 35740, 39314, 46462, 71480, 78628, 92924, 98285, 116155, 142960, 157256, 185848, 196570, 232310, 255541, 314512, 371696, 393140, 464620, 511082, 786280, 929240, 1022164, 1277705, 1572560, 1858480, 2044328, 2555410, 4088656, 5110820, 10221640, 20443280]

約数ペア:

[(1, 20443280), (2, 10221640), (4, 5110820), (5, 4088656), (8, 2555410), (10, 2044328), (11, 1858480), (13, 1572560), (16, 1277705), (20, 1022164), (22, 929240), (26, 786280), (40, 511082), (44, 464620), (52, 393140), (55, 371696), (65, 314512), (80, 255541), (88, 232310), (104, 196570), (110, 185848), (130, 157256), (143, 142960), (176, 116155), (208, 98285), (220, 92924), (260, 78628), (286, 71480), (440, 46462), (520, 39314), (572, 35740), (715, 28592), (880, 23231), (1040, 19657), (1144, 17870), (1430, 14296), (1787, 11440), (2288, 8935), (2860, 7148), (3574, 5720)]