21464940

素因数分解:

$2^2\times 3^1\times 5^1\times 7^4\times {\mathrm{149}}^1$

素因数の和:189

約数の個数: 120

約数和(自身を含む): 70585200

約数和(自身を除く): 49120260

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 49, 60, 70, 84, 98, 105, 140, 147, 149, 196, 210, 245, 294, 298, 343, 420, 447, 490, 588, 596, 686, 735, 745, 894, 980, 1029, 1043, 1372, 1470, 1490, 1715, 1788, 2058, 2086, 2235, 2401, 2940, 2980, 3129, 3430, 4116, 4172, 4470, 4802, 5145, 5215, 6258, 6860, 7203, 7301, 8940, 9604, 10290, 10430, 12005, 12516, 14406, 14602, 15645, 20580, 20860, 21903, 24010, 28812, 29204, 31290, 36015, 36505, 43806, 48020, 51107, 62580, 72030, 73010, 87612, 102214, 109515, 144060, 146020, 153321, 204428, 219030, 255535, 306642, 357749, 438060, 511070, 613284, 715498, 766605, 1022140, 1073247, 1430996, 1533210, 1788745, 2146494, 3066420, 3577490, 4292988, 5366235, 7154980, 10732470, 21464940]

約数ペア:

[(1, 21464940), (2, 10732470), (3, 7154980), (4, 5366235), (5, 4292988), (6, 3577490), (7, 3066420), (10, 2146494), (12, 1788745), (14, 1533210), (15, 1430996), (20, 1073247), (21, 1022140), (28, 766605), (30, 715498), (35, 613284), (42, 511070), (49, 438060), (60, 357749), (70, 306642), (84, 255535), (98, 219030), (105, 204428), (140, 153321), (147, 146020), (149, 144060), (196, 109515), (210, 102214), (245, 87612), (294, 73010), (298, 72030), (343, 62580), (420, 51107), (447, 48020), (490, 43806), (588, 36505), (596, 36015), (686, 31290), (735, 29204), (745, 28812), (894, 24010), (980, 21903), (1029, 20860), (1043, 20580), (1372, 15645), (1470, 14602), (1490, 14406), (1715, 12516), (1788, 12005), (2058, 10430), (2086, 10290), (2235, 9604), (2401, 8940), (2940, 7301), (2980, 7203), (3129, 6860), (3430, 6258), (4116, 5215), (4172, 5145), (4470, 4802)]