20672120

素因数分解:

$2^3\times 5^1\times 7^2\times {\mathrm{53}}^1\times {\mathrm{199}}^1$

素因数の和:277

約数の個数: 96

約数和(自身を含む): 55404000

約数和(自身を除く): 34731880

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 49, 53, 56, 70, 98, 106, 140, 196, 199, 212, 245, 265, 280, 371, 392, 398, 424, 490, 530, 742, 796, 980, 995, 1060, 1393, 1484, 1592, 1855, 1960, 1990, 2120, 2597, 2786, 2968, 3710, 3980, 5194, 5572, 6965, 7420, 7960, 9751, 10388, 10547, 11144, 12985, 13930, 14840, 19502, 20776, 21094, 25970, 27860, 39004, 42188, 48755, 51940, 52735, 55720, 73829, 78008, 84376, 97510, 103880, 105470, 147658, 195020, 210940, 295316, 369145, 390040, 421880, 516803, 590632, 738290, 1033606, 1476580, 2067212, 2584015, 2953160, 4134424, 5168030, 10336060, 20672120]

約数ペア:

[(1, 20672120), (2, 10336060), (4, 5168030), (5, 4134424), (7, 2953160), (8, 2584015), (10, 2067212), (14, 1476580), (20, 1033606), (28, 738290), (35, 590632), (40, 516803), (49, 421880), (53, 390040), (56, 369145), (70, 295316), (98, 210940), (106, 195020), (140, 147658), (196, 105470), (199, 103880), (212, 97510), (245, 84376), (265, 78008), (280, 73829), (371, 55720), (392, 52735), (398, 51940), (424, 48755), (490, 42188), (530, 39004), (742, 27860), (796, 25970), (980, 21094), (995, 20776), (1060, 19502), (1393, 14840), (1484, 13930), (1592, 12985), (1855, 11144), (1960, 10547), (1990, 10388), (2120, 9751), (2597, 7960), (2786, 7420), (2968, 6965), (3710, 5572), (3980, 5194)]