16443640

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{89}}^1\times {\mathrm{149}}^1$

素因数の和:280

約数の個数: 64

約数和(自身を含む): 38880000

約数和(自身を除く): 22436360

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 89, 124, 149, 155, 178, 248, 298, 310, 356, 445, 596, 620, 712, 745, 890, 1192, 1240, 1490, 1780, 2759, 2980, 3560, 4619, 5518, 5960, 9238, 11036, 13261, 13795, 18476, 22072, 23095, 26522, 27590, 36952, 46190, 53044, 55180, 66305, 92380, 106088, 110360, 132610, 184760, 265220, 411091, 530440, 822182, 1644364, 2055455, 3288728, 4110910, 8221820, 16443640]

約数ペア:

[(1, 16443640), (2, 8221820), (4, 4110910), (5, 3288728), (8, 2055455), (10, 1644364), (20, 822182), (31, 530440), (40, 411091), (62, 265220), (89, 184760), (124, 132610), (149, 110360), (155, 106088), (178, 92380), (248, 66305), (298, 55180), (310, 53044), (356, 46190), (445, 36952), (596, 27590), (620, 26522), (712, 23095), (745, 22072), (890, 18476), (1192, 13795), (1240, 13261), (1490, 11036), (1780, 9238), (2759, 5960), (2980, 5518), (3560, 4619)]