21489780

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{27551}}^1$

素因数の和:27576

約数の個数: 48

約数和(自身を含む): 64802304

約数和(自身を除く): 43312524

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 52, 60, 65, 78, 130, 156, 195, 260, 390, 780, 27551, 55102, 82653, 110204, 137755, 165306, 275510, 330612, 358163, 413265, 551020, 716326, 826530, 1074489, 1432652, 1653060, 1790815, 2148978, 3581630, 4297956, 5372445, 7163260, 10744890, 21489780]

約数ペア:

[(1, 21489780), (2, 10744890), (3, 7163260), (4, 5372445), (5, 4297956), (6, 3581630), (10, 2148978), (12, 1790815), (13, 1653060), (15, 1432652), (20, 1074489), (26, 826530), (30, 716326), (39, 551020), (52, 413265), (60, 358163), (65, 330612), (78, 275510), (130, 165306), (156, 137755), (195, 110204), (260, 82653), (390, 55102), (780, 27551)]