20740365

素因数分解:

$3^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{29}}^1\times {\mathrm{691}}^1$

素因数の和:754

約数の個数: 48

約数和(自身を含む): 38862720

約数和(自身を除く): 18122355

約数列:

[1, 3, 5, 9, 15, 23, 29, 45, 69, 87, 115, 145, 207, 261, 345, 435, 667, 691, 1035, 1305, 2001, 2073, 3335, 3455, 6003, 6219, 10005, 10365, 15893, 20039, 30015, 31095, 47679, 60117, 79465, 100195, 143037, 180351, 238395, 300585, 460897, 715185, 901755, 1382691, 2304485, 4148073, 6913455, 20740365]

約数ペア:

[(1, 20740365), (3, 6913455), (5, 4148073), (9, 2304485), (15, 1382691), (23, 901755), (29, 715185), (45, 460897), (69, 300585), (87, 238395), (115, 180351), (145, 143037), (207, 100195), (261, 79465), (345, 60117), (435, 47679), (667, 31095), (691, 30015), (1035, 20039), (1305, 15893), (2001, 10365), (2073, 10005), (3335, 6219), (3455, 6003)]