19972420

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^2\times {\mathrm{19}}^1\times {\mathrm{311}}^1$

素因数の和:365

約数の個数: 72

約数和(自身を含む): 47960640

約数和(自身を除く): 27988220

約数列:

[1, 2, 4, 5, 10, 13, 19, 20, 26, 38, 52, 65, 76, 95, 130, 169, 190, 247, 260, 311, 338, 380, 494, 622, 676, 845, 988, 1235, 1244, 1555, 1690, 2470, 3110, 3211, 3380, 4043, 4940, 5909, 6220, 6422, 8086, 11818, 12844, 16055, 16172, 20215, 23636, 29545, 32110, 40430, 52559, 59090, 64220, 76817, 80860, 105118, 118180, 153634, 210236, 262795, 307268, 384085, 525590, 768170, 998621, 1051180, 1536340, 1997242, 3994484, 4993105, 9986210, 19972420]

約数ペア:

[(1, 19972420), (2, 9986210), (4, 4993105), (5, 3994484), (10, 1997242), (13, 1536340), (19, 1051180), (20, 998621), (26, 768170), (38, 525590), (52, 384085), (65, 307268), (76, 262795), (95, 210236), (130, 153634), (169, 118180), (190, 105118), (247, 80860), (260, 76817), (311, 64220), (338, 59090), (380, 52559), (494, 40430), (622, 32110), (676, 29545), (845, 23636), (988, 20215), (1235, 16172), (1244, 16055), (1555, 12844), (1690, 11818), (2470, 8086), (3110, 6422), (3211, 6220), (3380, 5909), (4043, 4940)]