19723130

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{61}}^1\times {\mathrm{149}}^1$

素因数の和:255

約数の個数: 64

約数和(自身を含む): 42854400

約数和(自身を除く): 23131270

約数列:

[1, 2, 5, 7, 10, 14, 31, 35, 61, 62, 70, 122, 149, 155, 217, 298, 305, 310, 427, 434, 610, 745, 854, 1043, 1085, 1490, 1891, 2086, 2135, 2170, 3782, 4270, 4619, 5215, 9089, 9238, 9455, 10430, 13237, 18178, 18910, 23095, 26474, 32333, 45445, 46190, 63623, 64666, 66185, 90890, 127246, 132370, 161665, 281759, 318115, 323330, 563518, 636230, 1408795, 1972313, 2817590, 3944626, 9861565, 19723130]

約数ペア:

[(1, 19723130), (2, 9861565), (5, 3944626), (7, 2817590), (10, 1972313), (14, 1408795), (31, 636230), (35, 563518), (61, 323330), (62, 318115), (70, 281759), (122, 161665), (149, 132370), (155, 127246), (217, 90890), (298, 66185), (305, 64666), (310, 63623), (427, 46190), (434, 45445), (610, 32333), (745, 26474), (854, 23095), (1043, 18910), (1085, 18178), (1490, 13237), (1891, 10430), (2086, 9455), (2135, 9238), (2170, 9089), (3782, 5215), (4270, 4619)]