21197115

素因数分解:

$3^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{37}}^1\times {\mathrm{439}}^1$

素因数の和:516

約数の個数: 48

約数和(自身を含む): 39124800

約数和(自身を除く): 17927685

約数列:

[1, 3, 5, 9, 15, 29, 37, 45, 87, 111, 145, 185, 261, 333, 435, 439, 555, 1073, 1305, 1317, 1665, 2195, 3219, 3951, 5365, 6585, 9657, 12731, 16095, 16243, 19755, 38193, 48285, 48729, 63655, 81215, 114579, 146187, 190965, 243645, 471047, 572895, 730935, 1413141, 2355235, 4239423, 7065705, 21197115]

約数ペア:

[(1, 21197115), (3, 7065705), (5, 4239423), (9, 2355235), (15, 1413141), (29, 730935), (37, 572895), (45, 471047), (87, 243645), (111, 190965), (145, 146187), (185, 114579), (261, 81215), (333, 63655), (435, 48729), (439, 48285), (555, 38193), (1073, 19755), (1305, 16243), (1317, 16095), (1665, 12731), (2195, 9657), (3219, 6585), (3951, 5365)]