19848015

素因数分解:

$3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{101}}^1\times {\mathrm{397}}^1$

素因数の和:520

約数の個数: 48

約数和(自身を含む): 37997856

約数和(自身を除く): 18149841

約数列:

[1, 3, 5, 9, 11, 15, 33, 45, 55, 99, 101, 165, 303, 397, 495, 505, 909, 1111, 1191, 1515, 1985, 3333, 3573, 4367, 4545, 5555, 5955, 9999, 13101, 16665, 17865, 21835, 39303, 40097, 49995, 65505, 120291, 196515, 200485, 360873, 441067, 601455, 1323201, 1804365, 2205335, 3969603, 6616005, 19848015]

約数ペア:

[(1, 19848015), (3, 6616005), (5, 3969603), (9, 2205335), (11, 1804365), (15, 1323201), (33, 601455), (45, 441067), (55, 360873), (99, 200485), (101, 196515), (165, 120291), (303, 65505), (397, 49995), (495, 40097), (505, 39303), (909, 21835), (1111, 17865), (1191, 16665), (1515, 13101), (1985, 9999), (3333, 5955), (3573, 5555), (4367, 4545)]