21685740

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{31}}^1\times {\mathrm{89}}^1\times {\mathrm{131}}^1$

素因数の和:263

約数の個数: 96

約数和(自身を含む): 63866880

約数和(自身を除く): 42181140

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 31, 60, 62, 89, 93, 124, 131, 155, 178, 186, 262, 267, 310, 356, 372, 393, 445, 465, 524, 534, 620, 655, 786, 890, 930, 1068, 1310, 1335, 1572, 1780, 1860, 1965, 2620, 2670, 2759, 3930, 4061, 5340, 5518, 7860, 8122, 8277, 11036, 11659, 12183, 13795, 16244, 16554, 20305, 23318, 24366, 27590, 33108, 34977, 40610, 41385, 46636, 48732, 55180, 58295, 60915, 69954, 81220, 82770, 116590, 121830, 139908, 165540, 174885, 233180, 243660, 349770, 361429, 699540, 722858, 1084287, 1445716, 1807145, 2168574, 3614290, 4337148, 5421435, 7228580, 10842870, 21685740]

約数ペア:

[(1, 21685740), (2, 10842870), (3, 7228580), (4, 5421435), (5, 4337148), (6, 3614290), (10, 2168574), (12, 1807145), (15, 1445716), (20, 1084287), (30, 722858), (31, 699540), (60, 361429), (62, 349770), (89, 243660), (93, 233180), (124, 174885), (131, 165540), (155, 139908), (178, 121830), (186, 116590), (262, 82770), (267, 81220), (310, 69954), (356, 60915), (372, 58295), (393, 55180), (445, 48732), (465, 46636), (524, 41385), (534, 40610), (620, 34977), (655, 33108), (786, 27590), (890, 24366), (930, 23318), (1068, 20305), (1310, 16554), (1335, 16244), (1572, 13795), (1780, 12183), (1860, 11659), (1965, 11036), (2620, 8277), (2670, 8122), (2759, 7860), (3930, 5518), (4061, 5340)]