1638636720

素因数分解:

$2^4\times 3^1\times 5^1\times 7^1\times {\mathrm{975379}}^1$

素因数の和:975402

約数の個数: 80

約数和(自身を含む): 5805461760

約数和(自身を除く): 4166825040

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 16, 20, 21, 24, 28, 30, 35, 40, 42, 48, 56, 60, 70, 80, 84, 105, 112, 120, 140, 168, 210, 240, 280, 336, 420, 560, 840, 1680, 975379, 1950758, 2926137, 3901516, 4876895, 5852274, 6827653, 7803032, 9753790, 11704548, 13655306, 14630685, 15606064, 19507580, 20482959, 23409096, 27310612, 29261370, 34138265, 39015160, 40965918, 46818192, 54621224, 58522740, 68276530, 78030320, 81931836, 102414795, 109242448, 117045480, 136553060, 163863672, 204829590, 234090960, 273106120, 327727344, 409659180, 546212240, 819318360, 1638636720]

約数ペア:

[(1, 1638636720), (2, 819318360), (3, 546212240), (4, 409659180), (5, 327727344), (6, 273106120), (7, 234090960), (8, 204829590), (10, 163863672), (12, 136553060), (14, 117045480), (15, 109242448), (16, 102414795), (20, 81931836), (21, 78030320), (24, 68276530), (28, 58522740), (30, 54621224), (35, 46818192), (40, 40965918), (42, 39015160), (48, 34138265), (56, 29261370), (60, 27310612), (70, 23409096), (80, 20482959), (84, 19507580), (105, 15606064), (112, 14630685), (120, 13655306), (140, 11704548), (168, 9753790), (210, 7803032), (240, 6827653), (280, 5852274), (336, 4876895), (420, 3901516), (560, 2926137), (840, 1950758), (1680, 975379)]