19975620

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{199}}^1\times {\mathrm{239}}^1$

素因数の和:457

約数の個数: 96

約数和(自身を含む): 64512000

約数和(自身を除く): 44536380

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 199, 210, 239, 398, 420, 478, 597, 717, 796, 956, 995, 1194, 1195, 1393, 1434, 1673, 1990, 2388, 2390, 2786, 2868, 2985, 3346, 3585, 3980, 4179, 4780, 5019, 5572, 5970, 6692, 6965, 7170, 8358, 8365, 10038, 11940, 13930, 14340, 16716, 16730, 20076, 20895, 25095, 27860, 33460, 41790, 47561, 50190, 83580, 95122, 100380, 142683, 190244, 237805, 285366, 332927, 475610, 570732, 665854, 713415, 951220, 998781, 1331708, 1426830, 1664635, 1997562, 2853660, 3329270, 3995124, 4993905, 6658540, 9987810, 19975620]

約数ペア:

[(1, 19975620), (2, 9987810), (3, 6658540), (4, 4993905), (5, 3995124), (6, 3329270), (7, 2853660), (10, 1997562), (12, 1664635), (14, 1426830), (15, 1331708), (20, 998781), (21, 951220), (28, 713415), (30, 665854), (35, 570732), (42, 475610), (60, 332927), (70, 285366), (84, 237805), (105, 190244), (140, 142683), (199, 100380), (210, 95122), (239, 83580), (398, 50190), (420, 47561), (478, 41790), (597, 33460), (717, 27860), (796, 25095), (956, 20895), (995, 20076), (1194, 16730), (1195, 16716), (1393, 14340), (1434, 13930), (1673, 11940), (1990, 10038), (2388, 8365), (2390, 8358), (2786, 7170), (2868, 6965), (2985, 6692), (3346, 5970), (3585, 5572), (3980, 5019), (4179, 4780)]