19712940

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{127}}^1\times {\mathrm{199}}^1$

素因数の和:351

約数の個数: 96

約数和(自身を含む): 60211200

約数和(自身を除く): 40498260

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 52, 60, 65, 78, 127, 130, 156, 195, 199, 254, 260, 381, 390, 398, 508, 597, 635, 762, 780, 796, 995, 1194, 1270, 1524, 1651, 1905, 1990, 2388, 2540, 2587, 2985, 3302, 3810, 3980, 4953, 5174, 5970, 6604, 7620, 7761, 8255, 9906, 10348, 11940, 12935, 15522, 16510, 19812, 24765, 25273, 25870, 31044, 33020, 38805, 49530, 50546, 51740, 75819, 77610, 99060, 101092, 126365, 151638, 155220, 252730, 303276, 328549, 379095, 505460, 657098, 758190, 985647, 1314196, 1516380, 1642745, 1971294, 3285490, 3942588, 4928235, 6570980, 9856470, 19712940]

約数ペア:

[(1, 19712940), (2, 9856470), (3, 6570980), (4, 4928235), (5, 3942588), (6, 3285490), (10, 1971294), (12, 1642745), (13, 1516380), (15, 1314196), (20, 985647), (26, 758190), (30, 657098), (39, 505460), (52, 379095), (60, 328549), (65, 303276), (78, 252730), (127, 155220), (130, 151638), (156, 126365), (195, 101092), (199, 99060), (254, 77610), (260, 75819), (381, 51740), (390, 50546), (398, 49530), (508, 38805), (597, 33020), (635, 31044), (762, 25870), (780, 25273), (796, 24765), (995, 19812), (1194, 16510), (1270, 15522), (1524, 12935), (1651, 11940), (1905, 10348), (1990, 9906), (2388, 8255), (2540, 7761), (2587, 7620), (2985, 6604), (3302, 5970), (3810, 5174), (3980, 4953)]