21751380

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{61}}^1\times {\mathrm{283}}^1$

素因数の和:366

約数の個数: 144

約数和(自身を含む): 76911744

約数和(自身を除く): 55160364

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 28, 30, 35, 36, 42, 45, 60, 61, 63, 70, 84, 90, 105, 122, 126, 140, 180, 183, 210, 244, 252, 283, 305, 315, 366, 420, 427, 549, 566, 610, 630, 732, 849, 854, 915, 1098, 1132, 1220, 1260, 1281, 1415, 1698, 1708, 1830, 1981, 2135, 2196, 2547, 2562, 2745, 2830, 3396, 3660, 3843, 3962, 4245, 4270, 5094, 5124, 5490, 5660, 5943, 6405, 7686, 7924, 8490, 8540, 9905, 10188, 10980, 11886, 12735, 12810, 15372, 16980, 17263, 17829, 19215, 19810, 23772, 25470, 25620, 29715, 34526, 35658, 38430, 39620, 50940, 51789, 59430, 69052, 71316, 76860, 86315, 89145, 103578, 118860, 120841, 155367, 172630, 178290, 207156, 241682, 258945, 310734, 345260, 356580, 362523, 483364, 517890, 604205, 621468, 725046, 776835, 1035780, 1087569, 1208410, 1450092, 1553670, 1812615, 2175138, 2416820, 3107340, 3625230, 4350276, 5437845, 7250460, 10875690, 21751380]

約数ペア:

[(1, 21751380), (2, 10875690), (3, 7250460), (4, 5437845), (5, 4350276), (6, 3625230), (7, 3107340), (9, 2416820), (10, 2175138), (12, 1812615), (14, 1553670), (15, 1450092), (18, 1208410), (20, 1087569), (21, 1035780), (28, 776835), (30, 725046), (35, 621468), (36, 604205), (42, 517890), (45, 483364), (60, 362523), (61, 356580), (63, 345260), (70, 310734), (84, 258945), (90, 241682), (105, 207156), (122, 178290), (126, 172630), (140, 155367), (180, 120841), (183, 118860), (210, 103578), (244, 89145), (252, 86315), (283, 76860), (305, 71316), (315, 69052), (366, 59430), (420, 51789), (427, 50940), (549, 39620), (566, 38430), (610, 35658), (630, 34526), (732, 29715), (849, 25620), (854, 25470), (915, 23772), (1098, 19810), (1132, 19215), (1220, 17829), (1260, 17263), (1281, 16980), (1415, 15372), (1698, 12810), (1708, 12735), (1830, 11886), (1981, 10980), (2135, 10188), (2196, 9905), (2547, 8540), (2562, 8490), (2745, 7924), (2830, 7686), (3396, 6405), (3660, 5943), (3843, 5660), (3962, 5490), (4245, 5124), (4270, 5094)]