21501220

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{2017}}^1$

素因数の和:2080

約数の個数: 48

約数和(自身を含む): 49836528

約数和(自身を除く): 28335308

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 41, 52, 65, 82, 130, 164, 205, 260, 410, 533, 820, 1066, 2017, 2132, 2665, 4034, 5330, 8068, 10085, 10660, 20170, 26221, 40340, 52442, 82697, 104884, 131105, 165394, 262210, 330788, 413485, 524420, 826970, 1075061, 1653940, 2150122, 4300244, 5375305, 10750610, 21501220]

約数ペア:

[(1, 21501220), (2, 10750610), (4, 5375305), (5, 4300244), (10, 2150122), (13, 1653940), (20, 1075061), (26, 826970), (41, 524420), (52, 413485), (65, 330788), (82, 262210), (130, 165394), (164, 131105), (205, 104884), (260, 82697), (410, 52442), (533, 40340), (820, 26221), (1066, 20170), (2017, 10660), (2132, 10085), (2665, 8068), (4034, 5330)]