19977720

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{1399}}^1$

素因数の和:1437

約数の個数: 128

約数和(自身を含む): 72576000

約数和(自身を除く): 52598280

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 17, 20, 21, 24, 28, 30, 34, 35, 40, 42, 51, 56, 60, 68, 70, 84, 85, 102, 105, 119, 120, 136, 140, 168, 170, 204, 210, 238, 255, 280, 340, 357, 408, 420, 476, 510, 595, 680, 714, 840, 952, 1020, 1190, 1399, 1428, 1785, 2040, 2380, 2798, 2856, 3570, 4197, 4760, 5596, 6995, 7140, 8394, 9793, 11192, 13990, 14280, 16788, 19586, 20985, 23783, 27980, 29379, 33576, 39172, 41970, 47566, 48965, 55960, 58758, 71349, 78344, 83940, 95132, 97930, 117516, 118915, 142698, 146895, 166481, 167880, 190264, 195860, 235032, 237830, 285396, 293790, 332962, 356745, 391720, 475660, 499443, 570792, 587580, 665924, 713490, 832405, 951320, 998886, 1175160, 1331848, 1426980, 1664810, 1997772, 2497215, 2853960, 3329620, 3995544, 4994430, 6659240, 9988860, 19977720]

約数ペア:

[(1, 19977720), (2, 9988860), (3, 6659240), (4, 4994430), (5, 3995544), (6, 3329620), (7, 2853960), (8, 2497215), (10, 1997772), (12, 1664810), (14, 1426980), (15, 1331848), (17, 1175160), (20, 998886), (21, 951320), (24, 832405), (28, 713490), (30, 665924), (34, 587580), (35, 570792), (40, 499443), (42, 475660), (51, 391720), (56, 356745), (60, 332962), (68, 293790), (70, 285396), (84, 237830), (85, 235032), (102, 195860), (105, 190264), (119, 167880), (120, 166481), (136, 146895), (140, 142698), (168, 118915), (170, 117516), (204, 97930), (210, 95132), (238, 83940), (255, 78344), (280, 71349), (340, 58758), (357, 55960), (408, 48965), (420, 47566), (476, 41970), (510, 39172), (595, 33576), (680, 29379), (714, 27980), (840, 23783), (952, 20985), (1020, 19586), (1190, 16788), (1399, 14280), (1428, 13990), (1785, 11192), (2040, 9793), (2380, 8394), (2798, 7140), (2856, 6995), (3570, 5596), (4197, 4760)]