21358728

素因数分解:

$2^3\times 3^5\times {\mathrm{10987}}^1$

素因数の和:11008

約数の個数: 48

約数和(自身を含む): 59994480

約数和(自身を除く): 38635752

約数列:

[1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 27, 36, 54, 72, 81, 108, 162, 216, 243, 324, 486, 648, 972, 1944, 10987, 21974, 32961, 43948, 65922, 87896, 98883, 131844, 197766, 263688, 296649, 395532, 593298, 791064, 889947, 1186596, 1779894, 2373192, 2669841, 3559788, 5339682, 7119576, 10679364, 21358728]

約数ペア:

[(1, 21358728), (2, 10679364), (3, 7119576), (4, 5339682), (6, 3559788), (8, 2669841), (9, 2373192), (12, 1779894), (18, 1186596), (24, 889947), (27, 791064), (36, 593298), (54, 395532), (72, 296649), (81, 263688), (108, 197766), (162, 131844), (216, 98883), (243, 87896), (324, 65922), (486, 43948), (648, 32961), (972, 21974), (1944, 10987)]