21430920

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{823}}^1$

素因数の和:875

約数の個数: 128

約数和(自身を含む): 75939840

約数和(自身を除く): 54508920

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 31, 35, 40, 42, 56, 60, 62, 70, 84, 93, 105, 120, 124, 140, 155, 168, 186, 210, 217, 248, 280, 310, 372, 420, 434, 465, 620, 651, 744, 823, 840, 868, 930, 1085, 1240, 1302, 1646, 1736, 1860, 2170, 2469, 2604, 3255, 3292, 3720, 4115, 4340, 4938, 5208, 5761, 6510, 6584, 8230, 8680, 9876, 11522, 12345, 13020, 16460, 17283, 19752, 23044, 24690, 25513, 26040, 28805, 32920, 34566, 46088, 49380, 51026, 57610, 69132, 76539, 86415, 98760, 102052, 115220, 127565, 138264, 153078, 172830, 178591, 204104, 230440, 255130, 306156, 345660, 357182, 382695, 510260, 535773, 612312, 691320, 714364, 765390, 892955, 1020520, 1071546, 1428728, 1530780, 1785910, 2143092, 2678865, 3061560, 3571820, 4286184, 5357730, 7143640, 10715460, 21430920]

約数ペア:

[(1, 21430920), (2, 10715460), (3, 7143640), (4, 5357730), (5, 4286184), (6, 3571820), (7, 3061560), (8, 2678865), (10, 2143092), (12, 1785910), (14, 1530780), (15, 1428728), (20, 1071546), (21, 1020520), (24, 892955), (28, 765390), (30, 714364), (31, 691320), (35, 612312), (40, 535773), (42, 510260), (56, 382695), (60, 357182), (62, 345660), (70, 306156), (84, 255130), (93, 230440), (105, 204104), (120, 178591), (124, 172830), (140, 153078), (155, 138264), (168, 127565), (186, 115220), (210, 102052), (217, 98760), (248, 86415), (280, 76539), (310, 69132), (372, 57610), (420, 51026), (434, 49380), (465, 46088), (620, 34566), (651, 32920), (744, 28805), (823, 26040), (840, 25513), (868, 24690), (930, 23044), (1085, 19752), (1240, 17283), (1302, 16460), (1646, 13020), (1736, 12345), (1860, 11522), (2170, 9876), (2469, 8680), (2604, 8230), (3255, 6584), (3292, 6510), (3720, 5761), (4115, 5208), (4340, 4938)]