19894420

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{643}}^1$

素因数の和:689

約数の個数: 96

約数和(自身を含む): 54528768

約数和(自身を除く): 34634348

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 17, 20, 26, 28, 34, 35, 52, 65, 68, 70, 85, 91, 119, 130, 140, 170, 182, 221, 238, 260, 340, 364, 442, 455, 476, 595, 643, 884, 910, 1105, 1190, 1286, 1547, 1820, 2210, 2380, 2572, 3094, 3215, 4420, 4501, 6188, 6430, 7735, 8359, 9002, 10931, 12860, 15470, 16718, 18004, 21862, 22505, 30940, 33436, 41795, 43724, 45010, 54655, 58513, 76517, 83590, 90020, 109310, 117026, 142103, 153034, 167180, 218620, 234052, 284206, 292565, 306068, 382585, 568412, 585130, 710515, 765170, 994721, 1170260, 1421030, 1530340, 1989442, 2842060, 3978884, 4973605, 9947210, 19894420]

約数ペア:

[(1, 19894420), (2, 9947210), (4, 4973605), (5, 3978884), (7, 2842060), (10, 1989442), (13, 1530340), (14, 1421030), (17, 1170260), (20, 994721), (26, 765170), (28, 710515), (34, 585130), (35, 568412), (52, 382585), (65, 306068), (68, 292565), (70, 284206), (85, 234052), (91, 218620), (119, 167180), (130, 153034), (140, 142103), (170, 117026), (182, 109310), (221, 90020), (238, 83590), (260, 76517), (340, 58513), (364, 54655), (442, 45010), (455, 43724), (476, 41795), (595, 33436), (643, 30940), (884, 22505), (910, 21862), (1105, 18004), (1190, 16718), (1286, 15470), (1547, 12860), (1820, 10931), (2210, 9002), (2380, 8359), (2572, 7735), (3094, 6430), (3215, 6188), (4420, 4501)]