20817996

素因数分解:

$2^2\times 3^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{131}}^1$

素因数の和:215

約数の個数: 96

約数和(自身を含む): 55883520

約数和(自身を除く): 35065524

約数列:

[1, 2, 3, 4, 6, 12, 17, 19, 34, 38, 41, 51, 57, 68, 76, 82, 102, 114, 123, 131, 164, 204, 228, 246, 262, 323, 393, 492, 524, 646, 697, 779, 786, 969, 1292, 1394, 1558, 1572, 1938, 2091, 2227, 2337, 2489, 2788, 3116, 3876, 4182, 4454, 4674, 4978, 5371, 6681, 7467, 8364, 8908, 9348, 9956, 10742, 13243, 13362, 14934, 16113, 21484, 26486, 26724, 29868, 32226, 39729, 42313, 52972, 64452, 79458, 84626, 91307, 102049, 126939, 158916, 169252, 182614, 204098, 253878, 273921, 306147, 365228, 408196, 507756, 547842, 612294, 1095684, 1224588, 1734833, 3469666, 5204499, 6939332, 10408998, 20817996]

約数ペア:

[(1, 20817996), (2, 10408998), (3, 6939332), (4, 5204499), (6, 3469666), (12, 1734833), (17, 1224588), (19, 1095684), (34, 612294), (38, 547842), (41, 507756), (51, 408196), (57, 365228), (68, 306147), (76, 273921), (82, 253878), (102, 204098), (114, 182614), (123, 169252), (131, 158916), (164, 126939), (204, 102049), (228, 91307), (246, 84626), (262, 79458), (323, 64452), (393, 52972), (492, 42313), (524, 39729), (646, 32226), (697, 29868), (779, 26724), (786, 26486), (969, 21484), (1292, 16113), (1394, 14934), (1558, 13362), (1572, 13243), (1938, 10742), (2091, 9956), (2227, 9348), (2337, 8908), (2489, 8364), (2788, 7467), (3116, 6681), (3876, 5371), (4182, 4978), (4454, 4674)]