19966480

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{83}}^1\times {\mathrm{97}}^1$

素因数の和:224

約数の個数: 80

約数和(自身を含む): 48996864

約数和(自身を除く): 29030384

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 62, 80, 83, 97, 124, 155, 166, 194, 248, 310, 332, 388, 415, 485, 496, 620, 664, 776, 830, 970, 1240, 1328, 1552, 1660, 1940, 2480, 2573, 3007, 3320, 3880, 5146, 6014, 6640, 7760, 8051, 10292, 12028, 12865, 15035, 16102, 20584, 24056, 25730, 30070, 32204, 40255, 41168, 48112, 51460, 60140, 64408, 80510, 102920, 120280, 128816, 161020, 205840, 240560, 249581, 322040, 499162, 644080, 998324, 1247905, 1996648, 2495810, 3993296, 4991620, 9983240, 19966480]

約数ペア:

[(1, 19966480), (2, 9983240), (4, 4991620), (5, 3993296), (8, 2495810), (10, 1996648), (16, 1247905), (20, 998324), (31, 644080), (40, 499162), (62, 322040), (80, 249581), (83, 240560), (97, 205840), (124, 161020), (155, 128816), (166, 120280), (194, 102920), (248, 80510), (310, 64408), (332, 60140), (388, 51460), (415, 48112), (485, 41168), (496, 40255), (620, 32204), (664, 30070), (776, 25730), (830, 24056), (970, 20584), (1240, 16102), (1328, 15035), (1552, 12865), (1660, 12028), (1940, 10292), (2480, 8051), (2573, 7760), (3007, 6640), (3320, 6014), (3880, 5146)]