21491060

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{2039}}^1$

素因数の和:2096

約数の個数: 48

約数和(自身を含む): 49351680

約数和(自身を除く): 27860620

約数列:

[1, 2, 4, 5, 10, 17, 20, 31, 34, 62, 68, 85, 124, 155, 170, 310, 340, 527, 620, 1054, 2039, 2108, 2635, 4078, 5270, 8156, 10195, 10540, 20390, 34663, 40780, 63209, 69326, 126418, 138652, 173315, 252836, 316045, 346630, 632090, 693260, 1074553, 1264180, 2149106, 4298212, 5372765, 10745530, 21491060]

約数ペア:

[(1, 21491060), (2, 10745530), (4, 5372765), (5, 4298212), (10, 2149106), (17, 1264180), (20, 1074553), (31, 693260), (34, 632090), (62, 346630), (68, 316045), (85, 252836), (124, 173315), (155, 138652), (170, 126418), (310, 69326), (340, 63209), (527, 40780), (620, 34663), (1054, 20390), (2039, 10540), (2108, 10195), (2635, 8156), (4078, 5270)]