9906980

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{29}}^2\times {\mathrm{31}}^1$

素因数の和:117

約数の個数: 72

約数和(自身を含む): 23412480

約数和(自身を除く): 13505500

約数列:

[1, 2, 4, 5, 10, 19, 20, 29, 31, 38, 58, 62, 76, 95, 116, 124, 145, 155, 190, 290, 310, 380, 551, 580, 589, 620, 841, 899, 1102, 1178, 1682, 1798, 2204, 2356, 2755, 2945, 3364, 3596, 4205, 4495, 5510, 5890, 8410, 8990, 11020, 11780, 15979, 16820, 17081, 17980, 26071, 31958, 34162, 52142, 63916, 68324, 79895, 85405, 104284, 130355, 159790, 170810, 260710, 319580, 341620, 495349, 521420, 990698, 1981396, 2476745, 4953490, 9906980]

約数ペア:

[(1, 9906980), (2, 4953490), (4, 2476745), (5, 1981396), (10, 990698), (19, 521420), (20, 495349), (29, 341620), (31, 319580), (38, 260710), (58, 170810), (62, 159790), (76, 130355), (95, 104284), (116, 85405), (124, 79895), (145, 68324), (155, 63916), (190, 52142), (290, 34162), (310, 31958), (380, 26071), (551, 17980), (580, 17081), (589, 16820), (620, 15979), (841, 11780), (899, 11020), (1102, 8990), (1178, 8410), (1682, 5890), (1798, 5510), (2204, 4495), (2356, 4205), (2755, 3596), (2945, 3364)]