21854820

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{28019}}^1$

素因数の和:28044

約数の個数: 48

約数和(自身を含む): 65903040

約数和(自身を除く): 44048220

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, 28019, 56038, 84057, 112076, 140095, 168114, 280190, 336228, 364247, 420285, 560380, 728494, 840570, 1092741, 1456988, 1681140, 1821235, 2185482, 3642470, 4370964, 5463705, 7284940, 10927410, 21854820]

約数ペア:

[(1, 21854820), (2, 10927410), (3, 7284940), (4, 5463705), (5, 4370964), (6, 3642470), (10, 2185482), (12, 1821235), (13, 1681140), (15, 1456988), (20, 1092741), (26, 840570), (30, 728494), (39, 560380), (52, 420285), (60, 364247), (65, 336228), (78, 280190), (130, 168114), (156, 140095), (195, 112076), (260, 84057), (390, 56038), (780, 28019)]