21220420

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{4801}}^1$

素因数の和:4840

約数の個数: 48

約数和(自身を含む): 50824368

約数和(自身を除く): 29603948

約数列:

[1, 2, 4, 5, 10, 13, 17, 20, 26, 34, 52, 65, 68, 85, 130, 170, 221, 260, 340, 442, 884, 1105, 2210, 4420, 4801, 9602, 19204, 24005, 48010, 62413, 81617, 96020, 124826, 163234, 249652, 312065, 326468, 408085, 624130, 816170, 1061021, 1248260, 1632340, 2122042, 4244084, 5305105, 10610210, 21220420]

約数ペア:

[(1, 21220420), (2, 10610210), (4, 5305105), (5, 4244084), (10, 2122042), (13, 1632340), (17, 1248260), (20, 1061021), (26, 816170), (34, 624130), (52, 408085), (65, 326468), (68, 312065), (85, 249652), (130, 163234), (170, 124826), (221, 96020), (260, 81617), (340, 62413), (442, 48010), (884, 24005), (1105, 19204), (2210, 9602), (4420, 4801)]