20400680

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{1579}}^1$

素因数の和:1626

約数の個数: 64

約数和(自身を含む): 51192000

約数和(自身を除く): 30791320

約数列:

[1, 2, 4, 5, 8, 10, 17, 19, 20, 34, 38, 40, 68, 76, 85, 95, 136, 152, 170, 190, 323, 340, 380, 646, 680, 760, 1292, 1579, 1615, 2584, 3158, 3230, 6316, 6460, 7895, 12632, 12920, 15790, 26843, 30001, 31580, 53686, 60002, 63160, 107372, 120004, 134215, 150005, 214744, 240008, 268430, 300010, 510017, 536860, 600020, 1020034, 1073720, 1200040, 2040068, 2550085, 4080136, 5100170, 10200340, 20400680]

約数ペア:

[(1, 20400680), (2, 10200340), (4, 5100170), (5, 4080136), (8, 2550085), (10, 2040068), (17, 1200040), (19, 1073720), (20, 1020034), (34, 600020), (38, 536860), (40, 510017), (68, 300010), (76, 268430), (85, 240008), (95, 214744), (136, 150005), (152, 134215), (170, 120004), (190, 107372), (323, 63160), (340, 60002), (380, 53686), (646, 31580), (680, 30001), (760, 26843), (1292, 15790), (1579, 12920), (1615, 12632), (2584, 7895), (3158, 6460), (3230, 6316)]