21655431

素因数分解:

$3^5\times 7^1\times {\mathrm{29}}^1\times {\mathrm{439}}^1$

素因数の和:490

約数の個数: 48

約数和(自身を含む): 38438400

約数和(自身を除く): 16782969

約数列:

[1, 3, 7, 9, 21, 27, 29, 63, 81, 87, 189, 203, 243, 261, 439, 567, 609, 783, 1317, 1701, 1827, 2349, 3073, 3951, 5481, 7047, 9219, 11853, 12731, 16443, 27657, 35559, 38193, 49329, 82971, 89117, 106677, 114579, 248913, 267351, 343737, 746739, 802053, 1031211, 2406159, 3093633, 7218477, 21655431]

約数ペア:

[(1, 21655431), (3, 7218477), (7, 3093633), (9, 2406159), (21, 1031211), (27, 802053), (29, 746739), (63, 343737), (81, 267351), (87, 248913), (189, 114579), (203, 106677), (243, 89117), (261, 82971), (439, 49329), (567, 38193), (609, 35559), (783, 27657), (1317, 16443), (1701, 12731), (1827, 11853), (2349, 9219), (3073, 7047), (3951, 5481)]