7821320

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^3\times {\mathrm{89}}^1$

素因数の和:139

約数の個数: 64

約数和(自身を含む): 19278000

約数和(自身を除く): 11456680

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 89, 104, 130, 169, 178, 260, 338, 356, 445, 520, 676, 712, 845, 890, 1157, 1352, 1690, 1780, 2197, 2314, 3380, 3560, 4394, 4628, 5785, 6760, 8788, 9256, 10985, 11570, 15041, 17576, 21970, 23140, 30082, 43940, 46280, 60164, 75205, 87880, 120328, 150410, 195533, 300820, 391066, 601640, 782132, 977665, 1564264, 1955330, 3910660, 7821320]

約数ペア:

[(1, 7821320), (2, 3910660), (4, 1955330), (5, 1564264), (8, 977665), (10, 782132), (13, 601640), (20, 391066), (26, 300820), (40, 195533), (52, 150410), (65, 120328), (89, 87880), (104, 75205), (130, 60164), (169, 46280), (178, 43940), (260, 30082), (338, 23140), (356, 21970), (445, 17576), (520, 15041), (676, 11570), (712, 10985), (845, 9256), (890, 8788), (1157, 6760), (1352, 5785), (1690, 4628), (1780, 4394), (2197, 3560), (2314, 3380)]