20937710

素因数分解:

$2^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{137}}^1$

素因数の和:221

約数の個数: 64

約数和(自身を含む): 42923520

約数和(自身を除く): 21985810

約数列:

[1, 2, 5, 10, 17, 29, 31, 34, 58, 62, 85, 137, 145, 155, 170, 274, 290, 310, 493, 527, 685, 899, 986, 1054, 1370, 1798, 2329, 2465, 2635, 3973, 4247, 4495, 4658, 4930, 5270, 7946, 8494, 8990, 11645, 15283, 19865, 21235, 23290, 30566, 39730, 42470, 67541, 72199, 76415, 123163, 135082, 144398, 152830, 246326, 337705, 360995, 615815, 675410, 721990, 1231630, 2093771, 4187542, 10468855, 20937710]

約数ペア:

[(1, 20937710), (2, 10468855), (5, 4187542), (10, 2093771), (17, 1231630), (29, 721990), (31, 675410), (34, 615815), (58, 360995), (62, 337705), (85, 246326), (137, 152830), (145, 144398), (155, 135082), (170, 123163), (274, 76415), (290, 72199), (310, 67541), (493, 42470), (527, 39730), (685, 30566), (899, 23290), (986, 21235), (1054, 19865), (1370, 15283), (1798, 11645), (2329, 8990), (2465, 8494), (2635, 7946), (3973, 5270), (4247, 4930), (4495, 4658)]