19120760

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{89}}^1\times {\mathrm{131}}^1$

素因数の和:272

約数の個数: 64

約数和(自身を含む): 44906400

約数和(自身を除く): 25785640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 89, 131, 164, 178, 205, 262, 328, 356, 410, 445, 524, 655, 712, 820, 890, 1048, 1310, 1640, 1780, 2620, 3560, 3649, 5240, 5371, 7298, 10742, 11659, 14596, 18245, 21484, 23318, 26855, 29192, 36490, 42968, 46636, 53710, 58295, 72980, 93272, 107420, 116590, 145960, 214840, 233180, 466360, 478019, 956038, 1912076, 2390095, 3824152, 4780190, 9560380, 19120760]

約数ペア:

[(1, 19120760), (2, 9560380), (4, 4780190), (5, 3824152), (8, 2390095), (10, 1912076), (20, 956038), (40, 478019), (41, 466360), (82, 233180), (89, 214840), (131, 145960), (164, 116590), (178, 107420), (205, 93272), (262, 72980), (328, 58295), (356, 53710), (410, 46636), (445, 42968), (524, 36490), (655, 29192), (712, 26855), (820, 23318), (890, 21484), (1048, 18245), (1310, 14596), (1640, 11659), (1780, 10742), (2620, 7298), (3560, 5371), (3649, 5240)]