20389720

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{113}}^1\times {\mathrm{347}}^1$

素因数の和:484

約数の個数: 64

約数和(自身を含む): 49986720

約数和(自身を除く): 29597000

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 113, 130, 226, 260, 347, 452, 520, 565, 694, 904, 1130, 1388, 1469, 1735, 2260, 2776, 2938, 3470, 4511, 4520, 5876, 6940, 7345, 9022, 11752, 13880, 14690, 18044, 22555, 29380, 36088, 39211, 45110, 58760, 78422, 90220, 156844, 180440, 196055, 313688, 392110, 509743, 784220, 1019486, 1568440, 2038972, 2548715, 4077944, 5097430, 10194860, 20389720]

約数ペア:

[(1, 20389720), (2, 10194860), (4, 5097430), (5, 4077944), (8, 2548715), (10, 2038972), (13, 1568440), (20, 1019486), (26, 784220), (40, 509743), (52, 392110), (65, 313688), (104, 196055), (113, 180440), (130, 156844), (226, 90220), (260, 78422), (347, 58760), (452, 45110), (520, 39211), (565, 36088), (694, 29380), (904, 22555), (1130, 18044), (1388, 14690), (1469, 13880), (1735, 11752), (2260, 9022), (2776, 7345), (2938, 6940), (3470, 5876), (4511, 4520)]