19989620

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{227}}^1$

素因数の和:297

約数の個数: 96

約数和(自身を含む): 52399872

約数和(自身を除く): 32410252

約数列:

[1, 2, 4, 5, 7, 10, 14, 17, 20, 28, 34, 35, 37, 68, 70, 74, 85, 119, 140, 148, 170, 185, 227, 238, 259, 340, 370, 454, 476, 518, 595, 629, 740, 908, 1036, 1135, 1190, 1258, 1295, 1589, 2270, 2380, 2516, 2590, 3145, 3178, 3859, 4403, 4540, 5180, 6290, 6356, 7718, 7945, 8399, 8806, 12580, 15436, 15890, 16798, 17612, 19295, 22015, 27013, 31780, 33596, 38590, 41995, 44030, 54026, 58793, 77180, 83990, 88060, 108052, 117586, 135065, 142783, 167980, 235172, 270130, 285566, 293965, 540260, 571132, 587930, 713915, 999481, 1175860, 1427830, 1998962, 2855660, 3997924, 4997405, 9994810, 19989620]

約数ペア:

[(1, 19989620), (2, 9994810), (4, 4997405), (5, 3997924), (7, 2855660), (10, 1998962), (14, 1427830), (17, 1175860), (20, 999481), (28, 713915), (34, 587930), (35, 571132), (37, 540260), (68, 293965), (70, 285566), (74, 270130), (85, 235172), (119, 167980), (140, 142783), (148, 135065), (170, 117586), (185, 108052), (227, 88060), (238, 83990), (259, 77180), (340, 58793), (370, 54026), (454, 44030), (476, 41995), (518, 38590), (595, 33596), (629, 31780), (740, 27013), (908, 22015), (1036, 19295), (1135, 17612), (1190, 16798), (1258, 15890), (1295, 15436), (1589, 12580), (2270, 8806), (2380, 8399), (2516, 7945), (2590, 7718), (3145, 6356), (3178, 6290), (3859, 5180), (4403, 4540)]