21470020

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{7507}}^1$

素因数の和:7540

約数の個数: 48

約数和(自身を含む): 52976448

約数和(自身を除く): 31506428

約数列:

[1, 2, 4, 5, 10, 11, 13, 20, 22, 26, 44, 52, 55, 65, 110, 130, 143, 220, 260, 286, 572, 715, 1430, 2860, 7507, 15014, 30028, 37535, 75070, 82577, 97591, 150140, 165154, 195182, 330308, 390364, 412885, 487955, 825770, 975910, 1073501, 1651540, 1951820, 2147002, 4294004, 5367505, 10735010, 21470020]

約数ペア:

[(1, 21470020), (2, 10735010), (4, 5367505), (5, 4294004), (10, 2147002), (11, 1951820), (13, 1651540), (20, 1073501), (22, 975910), (26, 825770), (44, 487955), (52, 412885), (55, 390364), (65, 330308), (110, 195182), (130, 165154), (143, 150140), (220, 97591), (260, 82577), (286, 75070), (572, 37535), (715, 30028), (1430, 15014), (2860, 7507)]