721000420

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{131}}^1\times {\mathrm{39313}}^1$

素因数の和:39460

約数の個数: 48

約数和(自身を含む): 1743654528

約数和(自身を除く): 1022654108

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 131, 140, 262, 524, 655, 917, 1310, 1834, 2620, 3668, 4585, 9170, 18340, 39313, 78626, 157252, 196565, 275191, 393130, 550382, 786260, 1100764, 1375955, 2751910, 5150003, 5503820, 10300006, 20600012, 25750015, 36050021, 51500030, 72100042, 103000060, 144200084, 180250105, 360500210, 721000420]

約数ペア:

[(1, 721000420), (2, 360500210), (4, 180250105), (5, 144200084), (7, 103000060), (10, 72100042), (14, 51500030), (20, 36050021), (28, 25750015), (35, 20600012), (70, 10300006), (131, 5503820), (140, 5150003), (262, 2751910), (524, 1375955), (655, 1100764), (917, 786260), (1310, 550382), (1834, 393130), (2620, 275191), (3668, 196565), (4585, 157252), (9170, 78626), (18340, 39313)]