128520420

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{9871}}^1$

素因数の和:9921

約数の個数: 96

約数和(自身を含む): 424574976

約数和(自身を除く): 296054556

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 31, 35, 42, 60, 62, 70, 84, 93, 105, 124, 140, 155, 186, 210, 217, 310, 372, 420, 434, 465, 620, 651, 868, 930, 1085, 1302, 1860, 2170, 2604, 3255, 4340, 6510, 9871, 13020, 19742, 29613, 39484, 49355, 59226, 69097, 98710, 118452, 138194, 148065, 197420, 207291, 276388, 296130, 306001, 345485, 414582, 592260, 612002, 690970, 829164, 918003, 1036455, 1224004, 1381940, 1530005, 1836006, 2072910, 2142007, 3060010, 3672012, 4145820, 4284014, 4590015, 6120020, 6426021, 8568028, 9180030, 10710035, 12852042, 18360060, 21420070, 25704084, 32130105, 42840140, 64260210, 128520420]

約数ペア:

[(1, 128520420), (2, 64260210), (3, 42840140), (4, 32130105), (5, 25704084), (6, 21420070), (7, 18360060), (10, 12852042), (12, 10710035), (14, 9180030), (15, 8568028), (20, 6426021), (21, 6120020), (28, 4590015), (30, 4284014), (31, 4145820), (35, 3672012), (42, 3060010), (60, 2142007), (62, 2072910), (70, 1836006), (84, 1530005), (93, 1381940), (105, 1224004), (124, 1036455), (140, 918003), (155, 829164), (186, 690970), (210, 612002), (217, 592260), (310, 414582), (372, 345485), (420, 306001), (434, 296130), (465, 276388), (620, 207291), (651, 197420), (868, 148065), (930, 138194), (1085, 118452), (1302, 98710), (1860, 69097), (2170, 59226), (2604, 49355), (3255, 39484), (4340, 29613), (6510, 19742), (9871, 13020)]