20809980

素因数分解:

$2^2\times 3^3\times 5^1\times {\mathrm{89}}^1\times {\mathrm{433}}^1$

素因数の和:540

約数の個数: 96

約数和(自身を含む): 65620800

約数和(自身を除く): 44810820

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 27, 30, 36, 45, 54, 60, 89, 90, 108, 135, 178, 180, 267, 270, 356, 433, 445, 534, 540, 801, 866, 890, 1068, 1299, 1335, 1602, 1732, 1780, 2165, 2403, 2598, 2670, 3204, 3897, 4005, 4330, 4806, 5196, 5340, 6495, 7794, 8010, 8660, 9612, 11691, 12015, 12990, 15588, 16020, 19485, 23382, 24030, 25980, 38537, 38970, 46764, 48060, 58455, 77074, 77940, 115611, 116910, 154148, 192685, 231222, 233820, 346833, 385370, 462444, 578055, 693666, 770740, 1040499, 1156110, 1387332, 1734165, 2080998, 2312220, 3468330, 4161996, 5202495, 6936660, 10404990, 20809980]

約数ペア:

[(1, 20809980), (2, 10404990), (3, 6936660), (4, 5202495), (5, 4161996), (6, 3468330), (9, 2312220), (10, 2080998), (12, 1734165), (15, 1387332), (18, 1156110), (20, 1040499), (27, 770740), (30, 693666), (36, 578055), (45, 462444), (54, 385370), (60, 346833), (89, 233820), (90, 231222), (108, 192685), (135, 154148), (178, 116910), (180, 115611), (267, 77940), (270, 77074), (356, 58455), (433, 48060), (445, 46764), (534, 38970), (540, 38537), (801, 25980), (866, 24030), (890, 23382), (1068, 19485), (1299, 16020), (1335, 15588), (1602, 12990), (1732, 12015), (1780, 11691), (2165, 9612), (2403, 8660), (2598, 8010), (2670, 7794), (3204, 6495), (3897, 5340), (4005, 5196), (4330, 4806)]