19980240

素因数分解:

$2^4\times 3^1\times 5^1\times 7^2\times {\mathrm{1699}}^1$

素因数の和:1729

約数の個数: 120

約数和(自身を含む): 72093600

約数和(自身を除く): 52113360

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 16, 20, 21, 24, 28, 30, 35, 40, 42, 48, 49, 56, 60, 70, 80, 84, 98, 105, 112, 120, 140, 147, 168, 196, 210, 240, 245, 280, 294, 336, 392, 420, 490, 560, 588, 735, 784, 840, 980, 1176, 1470, 1680, 1699, 1960, 2352, 2940, 3398, 3920, 5097, 5880, 6796, 8495, 10194, 11760, 11893, 13592, 16990, 20388, 23786, 25485, 27184, 33980, 35679, 40776, 47572, 50970, 59465, 67960, 71358, 81552, 83251, 95144, 101940, 118930, 135920, 142716, 166502, 178395, 190288, 203880, 237860, 249753, 285432, 333004, 356790, 407760, 416255, 475720, 499506, 570864, 666008, 713580, 832510, 951440, 999012, 1248765, 1332016, 1427160, 1665020, 1998024, 2497530, 2854320, 3330040, 3996048, 4995060, 6660080, 9990120, 19980240]

約数ペア:

[(1, 19980240), (2, 9990120), (3, 6660080), (4, 4995060), (5, 3996048), (6, 3330040), (7, 2854320), (8, 2497530), (10, 1998024), (12, 1665020), (14, 1427160), (15, 1332016), (16, 1248765), (20, 999012), (21, 951440), (24, 832510), (28, 713580), (30, 666008), (35, 570864), (40, 499506), (42, 475720), (48, 416255), (49, 407760), (56, 356790), (60, 333004), (70, 285432), (80, 249753), (84, 237860), (98, 203880), (105, 190288), (112, 178395), (120, 166502), (140, 142716), (147, 135920), (168, 118930), (196, 101940), (210, 95144), (240, 83251), (245, 81552), (280, 71358), (294, 67960), (336, 59465), (392, 50970), (420, 47572), (490, 40776), (560, 35679), (588, 33980), (735, 27184), (784, 25485), (840, 23786), (980, 20388), (1176, 16990), (1470, 13592), (1680, 11893), (1699, 11760), (1960, 10194), (2352, 8495), (2940, 6796), (3398, 5880), (3920, 5097)]