21381990

素因数分解:

$2^1\times 3^1\times 5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{3511}}^1$

素因数の和:3557

約数の個数: 64

約数和(自身を含む): 60687360

約数和(自身を除く): 39305370

約数列:

[1, 2, 3, 5, 6, 7, 10, 14, 15, 21, 29, 30, 35, 42, 58, 70, 87, 105, 145, 174, 203, 210, 290, 406, 435, 609, 870, 1015, 1218, 2030, 3045, 3511, 6090, 7022, 10533, 17555, 21066, 24577, 35110, 49154, 52665, 73731, 101819, 105330, 122885, 147462, 203638, 245770, 305457, 368655, 509095, 610914, 712733, 737310, 1018190, 1425466, 1527285, 2138199, 3054570, 3563665, 4276398, 7127330, 10690995, 21381990]

約数ペア:

[(1, 21381990), (2, 10690995), (3, 7127330), (5, 4276398), (6, 3563665), (7, 3054570), (10, 2138199), (14, 1527285), (15, 1425466), (21, 1018190), (29, 737310), (30, 712733), (35, 610914), (42, 509095), (58, 368655), (70, 305457), (87, 245770), (105, 203638), (145, 147462), (174, 122885), (203, 105330), (210, 101819), (290, 73731), (406, 52665), (435, 49154), (609, 35110), (870, 24577), (1015, 21066), (1218, 17555), (2030, 10533), (3045, 7022), (3511, 6090)]