21982740

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{28183}}^1$

素因数の和:28208

約数の個数: 48

約数和(自身を含む): 66288768

約数和(自身を除く): 44306028

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, 28183, 56366, 84549, 112732, 140915, 169098, 281830, 338196, 366379, 422745, 563660, 732758, 845490, 1099137, 1465516, 1690980, 1831895, 2198274, 3663790, 4396548, 5495685, 7327580, 10991370, 21982740]

約数ペア:

[(1, 21982740), (2, 10991370), (3, 7327580), (4, 5495685), (5, 4396548), (6, 3663790), (10, 2198274), (12, 1831895), (13, 1690980), (15, 1465516), (20, 1099137), (26, 845490), (30, 732758), (39, 563660), (52, 422745), (60, 366379), (65, 338196), (78, 281830), (130, 169098), (156, 140915), (195, 112732), (260, 84549), (390, 56366), (780, 28183)]