21099890

素因数分解:

$2^1\times 5^1\times 7^2\times {\mathrm{17}}^2\times {\mathrm{149}}^1$

素因数の和:204

約数の個数: 72

約数和(自身を含む): 47247300

約数和(自身を除く): 26147410

約数列:

[1, 2, 5, 7, 10, 14, 17, 34, 35, 49, 70, 85, 98, 119, 149, 170, 238, 245, 289, 298, 490, 578, 595, 745, 833, 1043, 1190, 1445, 1490, 1666, 2023, 2086, 2533, 2890, 4046, 4165, 5066, 5215, 7301, 8330, 10115, 10430, 12665, 14161, 14602, 17731, 20230, 25330, 28322, 35462, 36505, 43061, 70805, 73010, 86122, 88655, 124117, 141610, 177310, 215305, 248234, 301427, 430610, 602854, 620585, 1241170, 1507135, 2109989, 3014270, 4219978, 10549945, 21099890]

約数ペア:

[(1, 21099890), (2, 10549945), (5, 4219978), (7, 3014270), (10, 2109989), (14, 1507135), (17, 1241170), (34, 620585), (35, 602854), (49, 430610), (70, 301427), (85, 248234), (98, 215305), (119, 177310), (149, 141610), (170, 124117), (238, 88655), (245, 86122), (289, 73010), (298, 70805), (490, 43061), (578, 36505), (595, 35462), (745, 28322), (833, 25330), (1043, 20230), (1190, 17731), (1445, 14602), (1490, 14161), (1666, 12665), (2023, 10430), (2086, 10115), (2533, 8330), (2890, 7301), (4046, 5215), (4165, 5066)]