21208180

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{67}}^1$

素因数の和:126

約数の個数: 144

約数和(自身を含む): 58605120

約数和(自身を除く): 37396940

約数列:

[1, 2, 4, 5, 7, 10, 14, 17, 19, 20, 28, 34, 35, 38, 49, 67, 68, 70, 76, 85, 95, 98, 119, 133, 134, 140, 170, 190, 196, 238, 245, 266, 268, 323, 335, 340, 380, 469, 476, 490, 532, 595, 646, 665, 670, 833, 931, 938, 980, 1139, 1190, 1273, 1292, 1330, 1340, 1615, 1666, 1862, 1876, 2261, 2278, 2345, 2380, 2546, 2660, 3230, 3283, 3332, 3724, 4165, 4522, 4556, 4655, 4690, 5092, 5695, 6365, 6460, 6566, 7973, 8330, 8911, 9044, 9310, 9380, 11305, 11390, 12730, 13132, 15827, 15946, 16415, 16660, 17822, 18620, 21641, 22610, 22780, 25460, 31654, 31892, 32830, 35644, 39865, 43282, 44555, 45220, 55811, 62377, 63308, 65660, 79135, 79730, 86564, 89110, 108205, 111622, 124754, 151487, 158270, 159460, 178220, 216410, 223244, 249508, 279055, 302974, 311885, 316540, 432820, 558110, 605948, 623770, 757435, 1060409, 1116220, 1247540, 1514870, 2120818, 3029740, 4241636, 5302045, 10604090, 21208180]

約数ペア:

[(1, 21208180), (2, 10604090), (4, 5302045), (5, 4241636), (7, 3029740), (10, 2120818), (14, 1514870), (17, 1247540), (19, 1116220), (20, 1060409), (28, 757435), (34, 623770), (35, 605948), (38, 558110), (49, 432820), (67, 316540), (68, 311885), (70, 302974), (76, 279055), (85, 249508), (95, 223244), (98, 216410), (119, 178220), (133, 159460), (134, 158270), (140, 151487), (170, 124754), (190, 111622), (196, 108205), (238, 89110), (245, 86564), (266, 79730), (268, 79135), (323, 65660), (335, 63308), (340, 62377), (380, 55811), (469, 45220), (476, 44555), (490, 43282), (532, 39865), (595, 35644), (646, 32830), (665, 31892), (670, 31654), (833, 25460), (931, 22780), (938, 22610), (980, 21641), (1139, 18620), (1190, 17822), (1273, 16660), (1292, 16415), (1330, 15946), (1340, 15827), (1615, 13132), (1666, 12730), (1862, 11390), (1876, 11305), (2261, 9380), (2278, 9310), (2345, 9044), (2380, 8911), (2546, 8330), (2660, 7973), (3230, 6566), (3283, 6460), (3332, 6365), (3724, 5695), (4165, 5092), (4522, 4690), (4556, 4655)]