20121980

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{53}}^1\times {\mathrm{463}}^1$

素因数の和:566

約数の個数: 48

約数和(自身を含む): 44198784

約数和(自身を除く): 24076804

約数列:

[1, 2, 4, 5, 10, 20, 41, 53, 82, 106, 164, 205, 212, 265, 410, 463, 530, 820, 926, 1060, 1852, 2173, 2315, 4346, 4630, 8692, 9260, 10865, 18983, 21730, 24539, 37966, 43460, 49078, 75932, 94915, 98156, 122695, 189830, 245390, 379660, 490780, 1006099, 2012198, 4024396, 5030495, 10060990, 20121980]

約数ペア:

[(1, 20121980), (2, 10060990), (4, 5030495), (5, 4024396), (10, 2012198), (20, 1006099), (41, 490780), (53, 379660), (82, 245390), (106, 189830), (164, 122695), (205, 98156), (212, 94915), (265, 75932), (410, 49078), (463, 43460), (530, 37966), (820, 24539), (926, 21730), (1060, 18983), (1852, 10865), (2173, 9260), (2315, 8692), (4346, 4630)]