19718980

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{59}}^1\times {\mathrm{983}}^1$

素因数の和:1068

約数の個数: 48

約数和(自身を含む): 44634240

約数和(自身を除く): 24915260

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 59, 68, 85, 118, 170, 236, 295, 340, 590, 983, 1003, 1180, 1966, 2006, 3932, 4012, 4915, 5015, 9830, 10030, 16711, 19660, 20060, 33422, 57997, 66844, 83555, 115994, 167110, 231988, 289985, 334220, 579970, 985949, 1159940, 1971898, 3943796, 4929745, 9859490, 19718980]

約数ペア:

[(1, 19718980), (2, 9859490), (4, 4929745), (5, 3943796), (10, 1971898), (17, 1159940), (20, 985949), (34, 579970), (59, 334220), (68, 289985), (85, 231988), (118, 167110), (170, 115994), (236, 83555), (295, 66844), (340, 57997), (590, 33422), (983, 20060), (1003, 19660), (1180, 16711), (1966, 10030), (2006, 9830), (3932, 5015), (4012, 4915)]