21013040

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{37}}^1\times {\mathrm{229}}^1$

素因数の和:310

約数の個数: 80

約数和(自身を含む): 52020480

約数和(自身を除く): 31007440

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 37, 40, 62, 74, 80, 124, 148, 155, 185, 229, 248, 296, 310, 370, 458, 496, 592, 620, 740, 916, 1145, 1147, 1240, 1480, 1832, 2290, 2294, 2480, 2960, 3664, 4580, 4588, 5735, 7099, 8473, 9160, 9176, 11470, 14198, 16946, 18320, 18352, 22940, 28396, 33892, 35495, 42365, 45880, 56792, 67784, 70990, 84730, 91760, 113584, 135568, 141980, 169460, 262663, 283960, 338920, 525326, 567920, 677840, 1050652, 1313315, 2101304, 2626630, 4202608, 5253260, 10506520, 21013040]

約数ペア:

[(1, 21013040), (2, 10506520), (4, 5253260), (5, 4202608), (8, 2626630), (10, 2101304), (16, 1313315), (20, 1050652), (31, 677840), (37, 567920), (40, 525326), (62, 338920), (74, 283960), (80, 262663), (124, 169460), (148, 141980), (155, 135568), (185, 113584), (229, 91760), (248, 84730), (296, 70990), (310, 67784), (370, 56792), (458, 45880), (496, 42365), (592, 35495), (620, 33892), (740, 28396), (916, 22940), (1145, 18352), (1147, 18320), (1240, 16946), (1480, 14198), (1832, 11470), (2290, 9176), (2294, 9160), (2480, 8473), (2960, 7099), (3664, 5735), (4580, 4588)]