20978190

素因数分解:

$2^1\times 3^5\times 5^1\times {\mathrm{89}}^1\times {\mathrm{97}}^1$

素因数の和:208

約数の個数: 96

約数和(自身を含む): 57788640

約数和(自身を除く): 36810450

約数列:

[1, 2, 3, 5, 6, 9, 10, 15, 18, 27, 30, 45, 54, 81, 89, 90, 97, 135, 162, 178, 194, 243, 267, 270, 291, 405, 445, 485, 486, 534, 582, 801, 810, 873, 890, 970, 1215, 1335, 1455, 1602, 1746, 2403, 2430, 2619, 2670, 2910, 4005, 4365, 4806, 5238, 7209, 7857, 8010, 8633, 8730, 12015, 13095, 14418, 15714, 17266, 21627, 23571, 24030, 25899, 26190, 36045, 39285, 43165, 43254, 47142, 51798, 72090, 77697, 78570, 86330, 108135, 117855, 129495, 155394, 216270, 233091, 235710, 258990, 388485, 466182, 699273, 776970, 1165455, 1398546, 2097819, 2330910, 3496365, 4195638, 6992730, 10489095, 20978190]

約数ペア:

[(1, 20978190), (2, 10489095), (3, 6992730), (5, 4195638), (6, 3496365), (9, 2330910), (10, 2097819), (15, 1398546), (18, 1165455), (27, 776970), (30, 699273), (45, 466182), (54, 388485), (81, 258990), (89, 235710), (90, 233091), (97, 216270), (135, 155394), (162, 129495), (178, 117855), (194, 108135), (243, 86330), (267, 78570), (270, 77697), (291, 72090), (405, 51798), (445, 47142), (485, 43254), (486, 43165), (534, 39285), (582, 36045), (801, 26190), (810, 25899), (873, 24030), (890, 23571), (970, 21627), (1215, 17266), (1335, 15714), (1455, 14418), (1602, 13095), (1746, 12015), (2403, 8730), (2430, 8633), (2619, 8010), (2670, 7857), (2910, 7209), (4005, 5238), (4365, 4806)]