19917720

素因数分解:

$2^3\times 3^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{907}}^1$

素因数の和:985

約数の個数: 96

約数和(自身を含む): 65866320

約数和(自身を除く): 45948600

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 18, 20, 24, 30, 36, 40, 45, 60, 61, 72, 90, 120, 122, 180, 183, 244, 305, 360, 366, 488, 549, 610, 732, 907, 915, 1098, 1220, 1464, 1814, 1830, 2196, 2440, 2721, 2745, 3628, 3660, 4392, 4535, 5442, 5490, 7256, 7320, 8163, 9070, 10884, 10980, 13605, 16326, 18140, 21768, 21960, 27210, 32652, 36280, 40815, 54420, 55327, 65304, 81630, 108840, 110654, 163260, 165981, 221308, 276635, 326520, 331962, 442616, 497943, 553270, 663924, 829905, 995886, 1106540, 1327848, 1659810, 1991772, 2213080, 2489715, 3319620, 3983544, 4979430, 6639240, 9958860, 19917720]

約数ペア:

[(1, 19917720), (2, 9958860), (3, 6639240), (4, 4979430), (5, 3983544), (6, 3319620), (8, 2489715), (9, 2213080), (10, 1991772), (12, 1659810), (15, 1327848), (18, 1106540), (20, 995886), (24, 829905), (30, 663924), (36, 553270), (40, 497943), (45, 442616), (60, 331962), (61, 326520), (72, 276635), (90, 221308), (120, 165981), (122, 163260), (180, 110654), (183, 108840), (244, 81630), (305, 65304), (360, 55327), (366, 54420), (488, 40815), (549, 36280), (610, 32652), (732, 27210), (907, 21960), (915, 21768), (1098, 18140), (1220, 16326), (1464, 13605), (1814, 10980), (1830, 10884), (2196, 9070), (2440, 8163), (2721, 7320), (2745, 7256), (3628, 5490), (3660, 5442), (4392, 4535)]