30721000

素因数分解:

$2^3\times 5^3\times {\mathrm{31}}^1\times {\mathrm{991}}^1$

素因数の和:1043

約数の個数: 64

約数和(自身を含む): 74280960

約数和(自身を除く): 43559960

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 31, 40, 50, 62, 100, 124, 125, 155, 200, 248, 250, 310, 500, 620, 775, 991, 1000, 1240, 1550, 1982, 3100, 3875, 3964, 4955, 6200, 7750, 7928, 9910, 15500, 19820, 24775, 30721, 31000, 39640, 49550, 61442, 99100, 122884, 123875, 153605, 198200, 245768, 247750, 307210, 495500, 614420, 768025, 991000, 1228840, 1536050, 3072100, 3840125, 6144200, 7680250, 15360500, 30721000]

約数ペア:

[(1, 30721000), (2, 15360500), (4, 7680250), (5, 6144200), (8, 3840125), (10, 3072100), (20, 1536050), (25, 1228840), (31, 991000), (40, 768025), (50, 614420), (62, 495500), (100, 307210), (124, 247750), (125, 245768), (155, 198200), (200, 153605), (248, 123875), (250, 122884), (310, 99100), (500, 61442), (620, 49550), (775, 39640), (991, 31000), (1000, 30721), (1240, 24775), (1550, 19820), (1982, 15500), (3100, 9910), (3875, 7928), (3964, 7750), (4955, 6200)]