21872240

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{21031}}^1$

素因数の和:21057

約数の個数: 40

約数和(自身を含む): 54767328

約数和(自身を除く): 32895088

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 1040, 21031, 42062, 84124, 105155, 168248, 210310, 273403, 336496, 420620, 546806, 841240, 1093612, 1367015, 1682480, 2187224, 2734030, 4374448, 5468060, 10936120, 21872240]

約数ペア:

[(1, 21872240), (2, 10936120), (4, 5468060), (5, 4374448), (8, 2734030), (10, 2187224), (13, 1682480), (16, 1367015), (20, 1093612), (26, 841240), (40, 546806), (52, 420620), (65, 336496), (80, 273403), (104, 210310), (130, 168248), (208, 105155), (260, 84124), (520, 42062), (1040, 21031)]