20984970

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{1789}}^1$

素因数の和:1839

約数の個数: 64

約数和(自身を含む): 55676160

約数和(自身を除く): 34691190

約数列:

[1, 2, 3, 5, 6, 10, 15, 17, 23, 30, 34, 46, 51, 69, 85, 102, 115, 138, 170, 230, 255, 345, 391, 510, 690, 782, 1173, 1789, 1955, 2346, 3578, 3910, 5367, 5865, 8945, 10734, 11730, 17890, 26835, 30413, 41147, 53670, 60826, 82294, 91239, 123441, 152065, 182478, 205735, 246882, 304130, 411470, 456195, 617205, 699499, 912390, 1234410, 1398998, 2098497, 3497495, 4196994, 6994990, 10492485, 20984970]

約数ペア:

[(1, 20984970), (2, 10492485), (3, 6994990), (5, 4196994), (6, 3497495), (10, 2098497), (15, 1398998), (17, 1234410), (23, 912390), (30, 699499), (34, 617205), (46, 456195), (51, 411470), (69, 304130), (85, 246882), (102, 205735), (115, 182478), (138, 152065), (170, 123441), (230, 91239), (255, 82294), (345, 60826), (391, 53670), (510, 41147), (690, 30413), (782, 26835), (1173, 17890), (1789, 11730), (1955, 10734), (2346, 8945), (3578, 5865), (3910, 5367)]