21240856

素因数分解:

$2^3\times 7^1\times {\mathrm{13}}^1\times {\mathrm{163}}^1\times {\mathrm{179}}^1$

素因数の和:368

約数の個数: 64

約数和(自身を含む): 49593600

約数和(自身を除く): 28352744

約数列:

[1, 2, 4, 7, 8, 13, 14, 26, 28, 52, 56, 91, 104, 163, 179, 182, 326, 358, 364, 652, 716, 728, 1141, 1253, 1304, 1432, 2119, 2282, 2327, 2506, 4238, 4564, 4654, 5012, 8476, 9128, 9308, 10024, 14833, 16289, 16952, 18616, 29177, 29666, 32578, 58354, 59332, 65156, 116708, 118664, 130312, 204239, 233416, 379301, 408478, 758602, 816956, 1517204, 1633912, 2655107, 3034408, 5310214, 10620428, 21240856]

約数ペア:

[(1, 21240856), (2, 10620428), (4, 5310214), (7, 3034408), (8, 2655107), (13, 1633912), (14, 1517204), (26, 816956), (28, 758602), (52, 408478), (56, 379301), (91, 233416), (104, 204239), (163, 130312), (179, 118664), (182, 116708), (326, 65156), (358, 59332), (364, 58354), (652, 32578), (716, 29666), (728, 29177), (1141, 18616), (1253, 16952), (1304, 16289), (1432, 14833), (2119, 10024), (2282, 9308), (2327, 9128), (2506, 8476), (4238, 5012), (4564, 4654)]