21636420

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{27739}}^1$

素因数の和:27764

約数の個数: 48

約数和(自身を含む): 65244480

約数和(自身を除く): 43608060

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, 27739, 55478, 83217, 110956, 138695, 166434, 277390, 332868, 360607, 416085, 554780, 721214, 832170, 1081821, 1442428, 1664340, 1803035, 2163642, 3606070, 4327284, 5409105, 7212140, 10818210, 21636420]

約数ペア:

[(1, 21636420), (2, 10818210), (3, 7212140), (4, 5409105), (5, 4327284), (6, 3606070), (10, 2163642), (12, 1803035), (13, 1664340), (15, 1442428), (20, 1081821), (26, 832170), (30, 721214), (39, 554780), (52, 416085), (60, 360607), (65, 332868), (78, 277390), (130, 166434), (156, 138695), (195, 110956), (260, 83217), (390, 55478), (780, 27739)]