20745200

素因数分解:

$2^4\times 5^2\times 7^1\times {\mathrm{31}}^1\times {\mathrm{239}}^1$

素因数の和:295

約数の個数: 120

約数和(自身を含む): 59043840

約数和(自身を除く): 38298640

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 25, 28, 31, 35, 40, 50, 56, 62, 70, 80, 100, 112, 124, 140, 155, 175, 200, 217, 239, 248, 280, 310, 350, 400, 434, 478, 496, 560, 620, 700, 775, 868, 956, 1085, 1195, 1240, 1400, 1550, 1673, 1736, 1912, 2170, 2390, 2480, 2800, 3100, 3346, 3472, 3824, 4340, 4780, 5425, 5975, 6200, 6692, 7409, 8365, 8680, 9560, 10850, 11950, 12400, 13384, 14818, 16730, 17360, 19120, 21700, 23900, 26768, 29636, 33460, 37045, 41825, 43400, 47800, 51863, 59272, 66920, 74090, 83650, 86800, 95600, 103726, 118544, 133840, 148180, 167300, 185225, 207452, 259315, 296360, 334600, 370450, 414904, 518630, 592720, 669200, 740900, 829808, 1037260, 1296575, 1481800, 2074520, 2593150, 2963600, 4149040, 5186300, 10372600, 20745200]

約数ペア:

[(1, 20745200), (2, 10372600), (4, 5186300), (5, 4149040), (7, 2963600), (8, 2593150), (10, 2074520), (14, 1481800), (16, 1296575), (20, 1037260), (25, 829808), (28, 740900), (31, 669200), (35, 592720), (40, 518630), (50, 414904), (56, 370450), (62, 334600), (70, 296360), (80, 259315), (100, 207452), (112, 185225), (124, 167300), (140, 148180), (155, 133840), (175, 118544), (200, 103726), (217, 95600), (239, 86800), (248, 83650), (280, 74090), (310, 66920), (350, 59272), (400, 51863), (434, 47800), (478, 43400), (496, 41825), (560, 37045), (620, 33460), (700, 29636), (775, 26768), (868, 23900), (956, 21700), (1085, 19120), (1195, 17360), (1240, 16730), (1400, 14818), (1550, 13384), (1673, 12400), (1736, 11950), (1912, 10850), (2170, 9560), (2390, 8680), (2480, 8365), (2800, 7409), (3100, 6692), (3346, 6200), (3472, 5975), (3824, 5425), (4340, 4780)]