19754020

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{6907}}^1$

素因数の和:6940

約数の個数: 48

約数和(自身を含む): 48742848

約数和(自身を除く): 28988828

約数列:

[1, 2, 4, 5, 10, 11, 13, 20, 22, 26, 44, 52, 55, 65, 110, 130, 143, 220, 260, 286, 572, 715, 1430, 2860, 6907, 13814, 27628, 34535, 69070, 75977, 89791, 138140, 151954, 179582, 303908, 359164, 379885, 448955, 759770, 897910, 987701, 1519540, 1795820, 1975402, 3950804, 4938505, 9877010, 19754020]

約数ペア:

[(1, 19754020), (2, 9877010), (4, 4938505), (5, 3950804), (10, 1975402), (11, 1795820), (13, 1519540), (20, 987701), (22, 897910), (26, 759770), (44, 448955), (52, 379885), (55, 359164), (65, 303908), (110, 179582), (130, 151954), (143, 138140), (220, 89791), (260, 75977), (286, 69070), (572, 34535), (715, 27628), (1430, 13814), (2860, 6907)]