20419490

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{1181}}^1$

素因数の和:1227

約数の個数: 64

約数和(自身を含む): 47658240

約数和(自身を除く): 27238750

約数列:

[1, 2, 5, 7, 10, 13, 14, 19, 26, 35, 38, 65, 70, 91, 95, 130, 133, 182, 190, 247, 266, 455, 494, 665, 910, 1181, 1235, 1330, 1729, 2362, 2470, 3458, 5905, 8267, 8645, 11810, 15353, 16534, 17290, 22439, 30706, 41335, 44878, 76765, 82670, 107471, 112195, 153530, 157073, 214942, 224390, 291707, 314146, 537355, 583414, 785365, 1074710, 1458535, 1570730, 2041949, 2917070, 4083898, 10209745, 20419490]

約数ペア:

[(1, 20419490), (2, 10209745), (5, 4083898), (7, 2917070), (10, 2041949), (13, 1570730), (14, 1458535), (19, 1074710), (26, 785365), (35, 583414), (38, 537355), (65, 314146), (70, 291707), (91, 224390), (95, 214942), (130, 157073), (133, 153530), (182, 112195), (190, 107471), (247, 82670), (266, 76765), (455, 44878), (494, 41335), (665, 30706), (910, 22439), (1181, 17290), (1235, 16534), (1330, 15353), (1729, 11810), (2362, 8645), (2470, 8267), (3458, 5905)]