20441720

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{2069}}^1$

素因数の和:2112

約数の個数: 64

約数和(自身を含む): 52164000

約数和(自身を除く): 31722280

約数列:

[1, 2, 4, 5, 8, 10, 13, 19, 20, 26, 38, 40, 52, 65, 76, 95, 104, 130, 152, 190, 247, 260, 380, 494, 520, 760, 988, 1235, 1976, 2069, 2470, 4138, 4940, 8276, 9880, 10345, 16552, 20690, 26897, 39311, 41380, 53794, 78622, 82760, 107588, 134485, 157244, 196555, 215176, 268970, 314488, 393110, 511043, 537940, 786220, 1022086, 1075880, 1572440, 2044172, 2555215, 4088344, 5110430, 10220860, 20441720]

約数ペア:

[(1, 20441720), (2, 10220860), (4, 5110430), (5, 4088344), (8, 2555215), (10, 2044172), (13, 1572440), (19, 1075880), (20, 1022086), (26, 786220), (38, 537940), (40, 511043), (52, 393110), (65, 314488), (76, 268970), (95, 215176), (104, 196555), (130, 157244), (152, 134485), (190, 107588), (247, 82760), (260, 78622), (380, 53794), (494, 41380), (520, 39311), (760, 26897), (988, 20690), (1235, 16552), (1976, 10345), (2069, 9880), (2470, 8276), (4138, 4940)]